1910 | 1911 | 1912 | 1913 | 1914 | 1915 | 1916 | 1917 | 1918 | 1919
1920 | 1921 | 1922 | 1923 | 1924 | 1925 | 1926 | 1927 | 1928 | 1929
1930 | 1931 | 1932 | 1933 | 1934 | 1935 | 1936 | 1937 | 1938 | 1939
1940 | 1941 | 1942 | 1943 | 1944 | 1945 | 1946 | 1947 | 1948 | 1949
1 Jan 1921
- Pierre Barjot was assigned to the ship Aldebaran and served in Asia. ww2dbase [Pierre Barjot | CPC]
Photo(s) dated 1 Jan 1921
4 Jan 1921
United States
- USS Arizona departed New York City, New York, United States. ww2dbase [Arizona | New York | CPC]
12 Jan 1921
Estonia
- Argentina recognized the Republic of Estonia. ww2dbase [CPC]
16 Jan 1921
Japan
- In the Japanese Navy, all ships except for battleships, battlecruisers, and cruisers were now named by the Minister of the Navy without the need for Emperor's approval. ww2dbase [Naming Convention of Japanese Navy Ships | CPC]
19 Jan 1921
Panama Canal Zone
- USS Arizona arrived at Colón, Panama Canal Zone and entered the canal. ww2dbase [Arizona | Colón | CPC]
20 Jan 1921
Panama Canal Zone
- USS Arizona passed through the Panama Canal and reached the Pacific Ocean. ww2dbase [Panama Canal | Arizona | CPC]
22 Jan 1921
Panama Canal Zone
- USS Arizona departed the Panama Canal Zone. ww2dbase [Arizona | CPC]
26 Jan 1921
Estonia
- France and the United Kingdom recognized the Republic of Estonia. ww2dbase [CPC]
29 Jan 1921
- Tama was commissioned into service. ww2dbase [Tama | CPC]
- Kiso was commissioned into service. ww2dbase [Kiso | CPC]
30 Jan 1921
China
- Hélène Deschamps was born in the French concession area of Tianjin, China. ww2dbase [Hélène Deschamps | Tianjin | CPC]
31 Jan 1921
- USS Arizona arrived at Callao, Peru. ww2dbase [Arizona | CPC]
1 Feb 1921
Germany
United Kingdom
Photo(s) dated 1 Feb 1921
5 Feb 1921
- USS Arizona departed Callao, Peru. ww2dbase [Arizona | CPC]
14 Feb 1921
- USS Arizona arrived at Balboa, Colombia. ww2dbase [Arizona | CPC]
15 Feb 1921
Germany
- Robert von Greim was promoted to the rank of Hauptmann. ww2dbase [Robert von Greim | CPC]
17 Feb 1921
Photo(s) dated 17 Feb 1921
19 Feb 1921
United States
- The keel of submarine S-44 was laid down by Bethlehem Shipbuilding Corporation at the Fore River Shipyard in Quincy, Massachusetts, United States. ww2dbase [S-44 | Quincy, Massachusetts | CPC]
- George Sakato was born in Colton, California, United States. ww2dbase [George Sakato | Colton, California | CPC]
21 Feb 1921
United States
22 Feb 1921
Panama Canal Zone
Russia
- In Russia, the State General Planning Commission (Gosplan) was established as an advisory body to the Council of Labour and Defence. ww2dbase [AC]
25 Feb 1921
- Oswald Mosley's daughter Vivien Elizabeth Mosley was born. ww2dbase [Oswald Mosley | CPC]
Georgia
- Russia occupied Tblisi, the capital of Georgia. ww2dbase [Tblisi | CPC]
Taiwan
- Major General Kojiro Satoi was named the chief of staff of the Taiwan Army. ww2dbase [CPC]
26 Feb 1921
- USS Arizona arrived at Guantánamo Bay Naval Base, Cuba. ww2dbase [Arizona | CPC]
1 Mar 1921
Australia
- Edmund Herring was admitted to practice law as a barrister and solicitor in Victoria, Australia. ww2dbase [Edmund Herring | CPC]
Russia
- The first congress of the Mongolian People's Party took place in Troitskosavsk (now Kyakhta), Buryat-Mongol Autonomous Oblast, Russia. ww2dbase [Troitskosavsk, Buryat-Mongol | CPC]
3 Mar 1921
Japan
- Prince Kotohito departed Japan to tour Europe with Prince Hirohito. ww2dbase [Kotohito | CPC]
5 Mar 1921
Russia
- Choibalsan was elected a member of the provisional revolutionary government by the first congress of the Mongolian People's Party in Troitskosavsk (now Kyakhta), Buryat-Mongol Autonomous Oblast, Russia. He was also made the deputy chief of the 400-strong separatist para-military organization Mongolian People's Army. ww2dbase [Choibalsan | Troitskosavsk, Buryat-Mongol | CPC]
Spain
- The Spanish Premier Eduardo Dato was assassinated by Catalan anarchists in Madrid, Spain. ww2dbase [AC]
10 Mar 1921
- Crown Prince Carol of Romania married Princess Helen (Elena) of Greece and Denmark in Athens, Greece. ww2dbase [Carol II | CPC]
17 Mar 1921
United States
- James Doolittle was promoted to the rank of first lieutenant in the US Army Air Service. ww2dbase [James Doolittle | CPC]
24 Mar 1921
United Kingdom
- Carrier Eagle underwent a reconstruction at Portsmouth, England, United Kingdom. ww2dbase [Eagle | Portsmouth, England | CPC]
26 Mar 1921
Photo(s) dated 26 Mar 1921
28 Mar 1921
Photo(s) dated 28 Mar 1921
29 Mar 1921
United States
2 Apr 1921
United States
- Clifton Cates was promoted to the permanent rank of captain; this was retroactively dated for 4 Jun 1920. ww2dbase [Clifton Cates | CPC]
7 Apr 1921
- Crown Prince Rupprecht of Bavaria married Princess Antoinette of Luxembourg. The ceremony was conducted by Pope Pius XII. ww2dbase [AC]
Germany
- The construction of cruiser Emden was ordered. ww2dbase [Emden | CPC]
11 Apr 1921
- USS R-1 was ordered to join the Pacific Fleet. ww2dbase [R-1 | CPC]
United States
- USS R-5 departed the east coast of the United States. ww2dbase [R-5 | CPC]
12 Apr 1921
Canada
- Canadian Lieutenant Colonel James Sutherland Brown developed Defense Scheme No. 1 to prepare for the situation in which the Americans would invade Canada. The plan called for a rapid offense and occupation of Seattle, Great Falls, Minneapolis, and Albany in the United States to buy time for British reinforcements to arrive. This plan was terminated in 1928. ww2dbase [CPC]
15 Apr 1921
- Kitakami was commissioned into service. ww2dbase [Kitakami | CPC]
Luxembourg
- Joseph Bech was appointed to Émile Reuter's cabinet as the Director-General for the Interior and Director-General for Education. ww2dbase [Joseph Bech | CPC]
18 Apr 1921
- Lawrence was commissioned into service. ww2dbase [Lawrence | CPC]
Photo(s) dated 18 Apr 1921
20 Apr 1921
Japan
- Tenryu was placed in reserve at Kure, Japan for the installation of radio direction finder equipment. ww2dbase [Tenryu | Kure, Hiroshima | CPC]
24 Apr 1921
- USS Arizona departed Guantánamo Bay Naval Base, Cuba. ww2dbase [Arizona | CPC]
29 Apr 1921
United States
- USS Arizona arrived at New York City, New York, United States. ww2dbase [Arizona | New York | CPC]
4 May 1921
Taiwan
- Lieutenant General Heitaro Fukuda was named the commanding officer of the Taiwan Army. ww2dbase [CPC]
United States
Photo(s) dated 4 May 1921
5 May 1921
United Kingdom
11 May 1921
Russia
- Semyon Timoshenko was awarded the Order of the Red Banner for the second time. ww2dbase [Semyon Timoshenko | CPC]
14 May 1921
Photo(s) dated 14 May 1921
15 May 1921
Photo(s) dated 15 May 1921
16 May 1921
United States
17 May 1921
- Captain Percy M. R. Royds was named the commanding officer of HMS Malaya. ww2dbase [Malaya | CPC]
19 May 1921
United States
- Joseph Rochefort was assigned to minesweeper Cardinal based at San Pedro, California, United States as the ship's chief engineer. ww2dbase [Joseph Rochefort | San Pedro, California | CPC]
Photo(s) dated 19 May 1921
21 May 1921
Hawaii
- USS R-14 arrived at Hilo, US Territory of Hawaii. ww2dbase [R-14 | Hilo, Hawaii | CPC]
24 May 1921
Ireland
- In southern Ireland the Sinn Fein party was re-elected unopposed. ww2dbase [AC]
26 May 1921
- Iwane Matsui assigned to the staff of the Japanese Vladivostok Expeditionary Force during the Siberian Intervention. ww2dbase [Iwane Matsui | CPC]
28 May 1921
Panama Canal Zone
3 Jun 1921
- Walden Ainsworth's appointment to the rank of Lieutenant Commander in the United States Navy was made permanent after serving at that grade on a temporary basis for several months. ww2dbase [Walden Ainsworth | DS]
8 Jun 1921
- HMS Effingham was launched. ww2dbase [Effingham | CPC]
Australia
- Edmund Herring signed the roll of counsel of the Victorian Bar. ww2dbase [Edmund Herring | CPC]
10 Jun 1921
- Prince Philip of Greece and Denmark (later Duke of Edinburgh) was born at Corfu, Greece. ww2dbase [AC]
15 Jun 1921
Korea
United States
- USS Arizona departed New York City, New York, United States. ww2dbase [Arizona | New York | CPC]
17 Jun 1921
- Margaret Ray was born in Fort Wayne, Indiana, United States. ww2dbase [Margaret Ray | CPC]
29 Jun 1921
United Kingdom
- In Britain, Lady Randolph Churchill died at her London home from gangrene that had set in following the amputation of a leg after a fall. ww2dbase [London, England | AC]
30 Jun 1921
United States
1 Jul 1921
- USS Arizona became the flagship of Vice Admiral John McDonald, commanding officer of Battle Force of the US Navy Atlantic Fleet; McDonald had been the battleship's first commanding officer almost five years prior. ww2dbase [Arizona | CPC]
United States
- Rear Admiral Carl T. Vogelgesang was named the commanding officer of New York Navy Yard in Brooklyn, New York, United States. ww2dbase [New York Navy Yard | Brooklyn, New York | CPC]
6 Jul 1921
- A truce was signed between the British Government and the IRA to allow negotiations to take place. The Nationalists wanted an independent Republic whilst the Lloyd George offered to create an Irish State with Dominion status under the king. As the weeks went by Lloyd George gradually won over the Irish delegates and finally obtained agreement (except for the status of Ulster) by an ultimatum - Peace or War. The Nationalists did not challenge it. ww2dbase [AC]
8 Jul 1921
Photo(s) dated 8 Jul 1921
9 Jul 1921
United States
- USS Arizona departed New York City, New York, United States. ww2dbase [Arizona | New York | CPC]
10 Jul 1921
Germany
- Adolf Hitler traveled to Augsburg, Germany to attend a political meeting to which he did not receive an invitation. He would immediately clash with fellow party members. ww2dbase [Adolf Hitler | Augsburg | CPC]
11 Jul 1921
Germany
- Adolf Hitler quit the Nazi Party due to disagreements with the party executive committee. ww2dbase [Adolf Hitler | Augsburg | CPC]
13 Jul 1921
- Continuing experiments started at Chesapeake Bay, Maryland, United States in Jun 1921 to test the effectiveness of various weapons against surface ships, US Army bombers sank the Destroyer G-102. ww2dbase [AC]
17 Jul 1921
Hungary
- Hannah Szenes was born in Hungary. ww2dbase [Hannah Szenes | CPC]
18 Jul 1921
- US Army and Navy aircraft sank light cruiser Frankfurt at Chesapeake Bay, Maryland, United States in experimental attacks on ships. ww2dbase [AC]
20 Jul 1921
- US Army, Navy, and Marine aircraft attacked battleship Ostfriesland at Chesapeake Bay, Maryland, United States in experimental attacks on ships. ww2dbase [AC]
Korea
- Major General Kinichi Yasumitsu was named the chief of staff of the Japanese Chosen Army in occupied Korea. ww2dbase [CPC]
21 Jul 1921
- After dropping a total of 63 bombs since the previous day in experimental attacks on ships, including 1,000-pound and 2,000-pound bombs, battleship Ostfriesland sank in Chesapeake Bay, Maryland, United States, proving that capital ships could be destroyed by unopposed aircraft. ww2dbase [AC]
- USS Maryland was commissioned into service. ww2dbase [Maryland | CPC]
22 Jul 1921
- USS Arizona arrived at Callao, Peru to observe the Peruvian independence celebrations. ww2dbase [Arizona | CPC]
- Peter Drummond was made an Officer of the Order of the British Empire. ww2dbase [Peter Drummond | CPC]
28 Jul 1921
United States
- Franklin Roosevelt set sail aboard a yacht from New York, New York, United States for a Boy Scouts event further north up the Hudson River. ww2dbase [Franklin Roosevelt | New York | CPC]
29 Jul 1921
Germany
- Adolf Hitler was invited back to the Nazi Party by Anton Drexler. As the condition for his return, Hitler demanded, and received, a sole dictatorial leadership position. He also received support from the other party leaders that the party headquarters would remain in München (Munich) for at least six years. ww2dbase [Adolf Hitler | München | TH, CPC]
30 Jul 1921
- Annabelle Craft was born in Galesburg, Illinois, United States. ww2dbase [Annabelle Craft | CPC]
1 Aug 1921
- California was commissioned into service. ww2dbase [California | CPC]
Taiwan
- Vice Admiral Kiyokaze Yoshida was named the commanding officer of the Mako naval port at Pescadores islands, Taiwan. ww2dbase [Mako Guard District | Mako, Hoko | CPC]
3 Aug 1921
- USS Arizona departed Callao, Peru. ww2dbase [Arizona | CPC]
6 Aug 1921
- The former German battleship Baden was sunk by the Royal Navy as a gunnery target. ww2dbase [AC]
7 Aug 1921
Turkmenia
- The Turkestan Autonomous Soviet Socialist Republic was established within the Russian Soviet Federative Socialist Republic. ww2dbase [CPC]
Photo(s) dated 7 Aug 1921
10 Aug 1921
- USS Arizona became the flagship of Battleship Division 7's Rear Admiral Josiah McKean at Balboa, Colombia. ww2dbase [Arizona | CPC]
11 Aug 1921
- Dr. E. H. Bennett diagnosed Franklin Roosevelt with a severe cold. ww2dbase [Franklin Roosevelt | CPC]
13 Aug 1921
- Franklin Roosevelt became paralyzed from the chest down. ww2dbase [Franklin Roosevelt | CPC]
14 Aug 1921
- Dr. William Keen diagnosed Franklin Roosevelt as having a blood clot in his spine. ww2dbase [Franklin Roosevelt | CPC]
17 Aug 1921
Japan
- Kichisaburo Nomura was made a member of the Japanese delegation for the Washington Naval Conference. ww2dbase [Kichisaburo Nomura | CPC]
20 Aug 1921
United States
- Joseph Rochefort became one of the rare few during this period who were transferred from the naval reserve into the United States Navy. He was given the rank of ensign. ww2dbase [Joseph Rochefort | CPC]
21 Aug 1921
Japan
United States
25 Aug 1921
- Dr. Robert Lovett diagnosed Franklin Roosevelt with poliomyelitis; this was supported by Dr. E. H. Bennett. ww2dbase [Franklin Roosevelt | CPC]
1 Sep 1921
- The US battleship Washington (BB47) was launched by New York Shipbuilding but was cancelled as a consequence of the Washington Treaty of 1922 before completion. ww2dbase [AC]
3 Sep 1921
Japan
- Prince Kotohito returned to Japan. ww2dbase [Kotohito | CPC]
Photo(s) dated 3 Sep 1921
14 Sep 1921
United States
- The keel of the oiler which would later be named Kamoi was laid down by New York Shipbuilding in Camden, New Jersey, United States. ww2dbase [Kamoi | Camden, New Jersey | CPC]
16 Sep 1921
- The newspaper New York Times announced that US politician Franklin Roosevelt was suffering from poliomyelitis. ww2dbase [Franklin Roosevelt | CPC]
23 Sep 1921
Japan
- Naoshi Kanno was born in a village near Edano (now Kakuda), Miyagi Prefecture, Japan. ww2dbase [Naoshi Kanno | Edano, Miyagi | CPC]
24 Sep 1921
Japan
- Prince Kotohito was awarded Collar of the Supreme Order of the Chrysanthemum. ww2dbase [Kotohito | CPC]
30 Sep 1921
United States
Photo(s) dated 30 Sep 1921
1 Oct 1921
- Georg von Bismarck was transferred to the German 3rd Cavalry Regiment. ww2dbase [Georg von Bismarck | CPC]
10 Oct 1921
- Oi was commissioned into service. ww2dbase [Oi | CPC]
Japan
- Settsu was reclassified as a guard ship and training vessel. ww2dbase [Settsu | CPC]
12 Oct 1921
United States
- USS Stewart was assigned to US Navy's Destroyer Squadron, Atlantic. ww2dbase [Stewart | CPC]
14 Oct 1921
Russia
- Boris Shaposhnikov was awarded his first Order of the Red Banner. ww2dbase [Boris Shaposhnikov | CPC]
19 Oct 1921
United Kingdom
- Harry Dimoline was promoted to the rank of second lieutenant with the 59th (4th West Lancashire) Medium Brigade, Royal Garrison Artillery, British Territorial Army. ww2dbase [Harry Dimoline | CPC]
26 Oct 1921
United States
- In a speech in Birmingham, Alabama, United States, President Warren Harding advocated Civil Rights for African-Americans. ww2dbase [Birmingham, Alabama | AC]
30 Oct 1921
Photo(s) dated 30 Oct 1921
1 Nov 1921
- Chuichi Nagumo was named the chief of staff of the First Minelayer Flotilla. ww2dbase [Chuichi Nagumo | CPC]
Japan
7 Nov 1921
- The Fasci di combattiment (Fighting Fascists) organization in Italy was transformed into the Partito Nazionale Fascista (Fascist National Party). ww2dbase [CPC]
10 Nov 1921
- Hiroaki Abe was transferred out of Japanese Navy 3rd Fleet. ww2dbase [Hiroaki Abe | CPC]
France
- Lorraine began a period of refitting. ww2dbase [Lorraine | CPC]
13 Nov 1921
- Light carrier Hosho was launched. ww2dbase [Hosho | CPC]
16 Nov 1921
United States
- Joseph Rochefort requested transfer to battleship USS Connecticut. ww2dbase [Joseph Rochefort | CPC]
19 Nov 1921
Photo(s) dated 19 Nov 1921
20 Nov 1921
Japan
- Captain Shigezo Oyamada was named the commanding officer of Settsu. ww2dbase [Settsu | CPC]
22 Nov 1921
United States
- USAT Leonora was taken off of the US Army ship list and was transferred to the United States Navy. ww2dbase [Canopus | CPC]
1 Dec 1921
- Chiaki Matsuda was made the squadron strategy officer with his post aboard battleship Kongo. ww2dbase [Chiaki Matsuda | CPC]
- Captain Teijiro Murase was made the Chief Eqiupping Officer of the oiler which would later be named Kamoi; Murase and a group of junior officers would soon depart Japan for the United States where the ship was currently under construction. ww2dbase [Kamoi | CPC]
China
- Vice Admiral Kesataro Kawahara succeeded Vice Admiral Naoe Nakano as the commanding officer of the Ryojun Military Port (previously known as Port Arthur; now Lushunkou, Liaoning Province, China), Kwantung Leased Territory in northeastern China. ww2dbase [Ryojun Guard District | Lushunkou, Liaoning | CPC]
Japan
- Tenryu was recommissioned into service and was assigned to Destroyer Squadron 1 of Japanese 1st Fleet. Captain Noriyoshi Yoko was named her commanding officer. ww2dbase [Tenryu | CPC]
- Masafumi Arima was promoted to the rank of lieutenant. ww2dbase [Masafumi Arima | CPC]
- Engineering Rear Admiral Sadago Okazaki was made the commanding officer of Maizuru Naval Arsenal in Kyoto Prefecture, Japan. ww2dbase [Maizuru Naval Arsenal | Maizuru, Kyoto | CPC]
- Minoru Ota was assigned to battleship Hiei. ww2dbase [Minoru Ota | CPC]
5 Dec 1921
Japan
- Satoru Anabuki was born in the village of Yamada (now in the town of Ayagawa), Kagawa Prefecture, Japan. ww2dbase [Satoru Anabuki | Yamada, Kagawa | CPC]
6 Dec 1921
- A treaty was signed between the British Government and the Irish Nationalists, and the Irish Free State came into existence. ww2dbase [AC]
9 Dec 1921
United States
- Commander Halsey Powell was made the commanding officer of USS Stewart. ww2dbase [Stewart | AC, CPC]
18 Dec 1921
Japan
- The 40,000-ton battleship Tosa was launched by Mitsubishi at Nagasaki, Japan. Intended to be one of the second pair of high-speed battleships under the 8-8 programme, she would be cancelled before completion by the Washington Treaty and eventually scuttled on 9 Feb 1925. ww2dbase [Mitsubishi Nagasaki Shipyard | Nagasaki | AC]
19 Dec 1921
Germany
- Karl von Le Suire was awarded the Iron Cross 1st Class. ww2dbase [Karl von Le Suire | CPC]
20 Dec 1921
Photo(s) dated 20 Dec 1921
21 Dec 1921
- Erwin Rommel joined the post-WW1 German Reichswehr and became the commanding officer of 4th Company of the 13th Infantry Regiment based in Stuttgart. ww2dbase [Erwin Rommel | CPC]
26 Dec 1921
Taiwan
- Vice Admiral Hisatsune Iida was named the commanding officer of the Mako naval port at Pescadores islands, Taiwan. ww2dbase [Mako Guard District | Mako, Hoko | CPC]
31 Dec 1921
United States
- Joseph Rochefort was assigned to USS Connecticut. ww2dbase [Joseph Rochefort | CPC]
Timeline Section Founder: Thomas Houlihan
Contributors: Alan Chanter, C. Peter Chen, Thomas Houlihan, Hugh Martyr, David Stubblebine
Special Thanks: Rory Curtis
