In 1921, Junichi Miura created the first double-coil bulb using a coiled coil tungsten filament while working for Hakunetsusha (a predecessor of Toshiba). At the time, machinery to mass-produce coiled coil filaments did not exist. Hakunetsusha developed a method to mass-produce coiled coil filaments by 1936.
There were pro-independence movements in 1911 against the colonization policy of the late Qing dynasty. Finally, the Mongolian People's Party took power in Mongolia in 1921 with the help of the Soviet Union, after White Russian and Chinese forces had been expelled.
Sun's efforts to obtain aid from the several countries were ignored, thus he turned to the Soviet Union in 1921. For political expediency, the Soviet leadership initiated a dual policy of support for both Sun and the newly established Communist Party of China, which would eventually found the People's Republic of China. Thus the struggle for power in China began between the KMT and the CPC.
During the following eight months until the Truce of July 1921, there was a spiraling of the death toll in the conflict, with 1,000 people including the RIC police, army, IRA volunteers and civilians, being killed in the months between January and July 1921 alone.
In 1921, U.S. President Warren G. Harding received her at the White House to present her with the 1 gram of radium collected in the United States, and the First Lady praised her as an example of a professional achiever who was also a supportive wife.
In 1921, she was welcomed triumphantly when she toured the United States to raise funds for research on radium. Mrs. William Brown Meloney, after interviewing Curie, created a Marie Curie Radium Fund and raised money to buy radium, publicizing her trip.
Churchill became Secretary of State for the Colonies in February 1921. The following month, the first exhibit of his paintings was held; it took place in Paris, with Churchill exhibiting under a pseudonym.
On 19 March 1921, Tom Barry's 100-strong West Cork IRA unit fought an action against 1,200 British troops – the Crossbarry Ambush. Barry's men narrowly avoided being trapped by converging British columns and inflicted between ten and thirty killed on the British side.
Three months into the marriage (Feb-Mar 1919), Garvey sought an annulment, on the basis of Ashwood's alleged adultery and the claim that she had used "fraud and concealment" to induce the marriage. She launched a counter-claim for desertion, requesting $75 a week alimony. The court rejected this sum, instead ordering Garvey to pay her $12 a week. It refused to grant him the divorce. The court proceedings continued for two years. Now separated (Year 1921), Garvey moved into a 129th Street apartment with Jacques and Henrietta Vinton Davis, an arrangement that at the time could have caused some social controversy. He was later joined there by his sister Indiana and her husband, Alfred Peart. Ashwood, meanwhile, went on to become a lyricist and musical director for musicals amid the Harlem Renaissance.
In May 1921, the success of the "Laugh-O-Grams" led to the establishment of Laugh-O-Gram Studio, for which he hired more animators, including Fred Harman's brother Hugh, Rudolf Ising and Iwerks. The Laugh-O-Grams cartoons did not provide enough income to keep the company solvent, so Disney started production of Alice's Wonderland—based on Alice's Adventures in Wonderland—which combined live-action with animation; he cast Virginia Davis in the title role. The result, a 12-and-a-half-minute, one-reel film, was completed too late to save Laugh-O-Gram Studio, which went into bankruptcy in 1923.
On 5 May 1921, the reparation Commission established the London Schedule of Payments and a final reparation sum of 132 billion gold marks to be demanded of all the Central Powers. This was the public assessment of what the Central Powers combined could pay, and was also a compromise between Belgian, British, and French demands and assessments. Furthermore, the Commission recognized that the Central Powers could pay little and that the burden would fall upon Germany.
A general election for the Parliament of Southern Ireland was held on 13 May. Sinn Féin won 124 of the new parliament's 128 seats unopposed, but its elected members refused to take their seats.
The biggest single loss for the IRA, however, came in Dublin. On 25 May 1921, several hundred IRA men from the Dublin Brigade occupied and burned the Custom House (the center of local government in Ireland) in Dublin city center. Symbolically, this was intended to show that British rule in Ireland was untenable. However, from a military point of view, it was a heavy defeat in which five IRA men were killed and over eighty captured.
On 6 June 1921, the British made their first conciliatory gesture, calling off the policy of house burnings as reprisals. On the other side, IRA leaders and in particular Michael Collins, felt that the IRA as it was then organized could not continue indefinitely. It had been hard-pressed by the deployment of more regular British soldiers to Ireland and by the lack of arms and ammunition.
In June 1921, the League announced its decision: the islands were to remain a part of Finland, but with guaranteed protection of the islanders, including demilitarisation. With Sweden's reluctant agreement, this became the first European international agreement concluded directly through the League.
Prince Philip of Greece and Denmark was born in Mon Repos on the Greek island of Corfu on 10 June 1921, the only son and fifth and last child of Prince Andrew of Greece and Denmark and Princess Alice of Battenberg. A member of the House of Glücksburg, the ruling house of Denmark, he was a prince of both Greece and Denmark by virtue of his patrilineal descent from George I of Greece and Christian IX of Denmark, and he was from birth in the line of succession to both thrones.
On 24 June 1921, the British Coalition Government's Cabinet decided to propose talks with the leader of Sinn Féin. Coalition Liberals and Unionists agreed that an offer to negotiate would strengthen the Government's position if Sinn Féin refused.
it was decided to hold a central meeting, which began in Shanghai on July 23, 1921. The first session of the National Congress of the Communist Party of China was attended by 13 delegates, Mao included.After the authorities sent a police spy to the congress, the delegates moved to a boat on South Lake near Jiaxing, in Zhejiang, to escape detection.
The Communist Party of China was founded by Chen Duxiu and Li Dazhao in the French concession of Shanghai in 1921 as a study society and informal network. Mao set up a Changsha branch, also establishing a branch of the Socialist Youth Corps.
Hitler announced he would rejoin on the condition that he would replace Drexler as party chairman, and that the party headquarters would remain in Munich. The committee agreed, and he rejoined the party on 26 July as member 3,680. Hitler continued to face some opposition within the NSDAP: Opponents of Hitler in the leadership had Hermann Esser expelled from the party, and they printed 3,000 copies of a pamphlet attacking Hitler as a traitor to the party.
Hitler spoke to several packed houses and defended himself and Esser, to thunderous applause. His strategy proved successful, and at a special party congress on 29 July, he was granted absolute powers as party chairman, replacing Drexler, by a vote of 533 to 1
While the Roosevelts were vacationing at Campobello Island in August 1921, Roosevelt fell ill. His main symptoms were fever; symmetric, ascending paralysis; facial paralysis; bowel and bladder dysfunction; numbness and hyperesthesia; and a descending pattern of recovery.
After the assassination of Milorad Drašković, the Yugoslav Minister of the Interior, by a young communist named Alija Alijagić on 2 August 1921, the CPY was declared illegal under the Yugoslav State Security Act of 1921.
Du Bois traveled to Europe in 1921 to attend the second Pan-African Congress. The assembled black leaders from around the world issued the London Resolutions and established a Pan-African Association headquarters in Paris. Under Du Bois's guidance, the resolutions insisted on racial equality, and that Africa be ruled by Africans (not, as in the 1919 congress, with the consent of Africans).
Shortly after Philip's birth, his maternal grandfather Prince Louis of Battenberg, then known as Louis Mountbatten, Marquess of Milford Haven, died in London. Louis was a naturalized British subject who, after a career in the Royal Navy, had renounced his German titles and adopted the surname Mountbatten—an Anglicised version of Battenberg—during the First World War, owing to anti-German sentiment in Britain. After visiting London for his grandfather's memorial service, Philip and his mother returned to Greece, where Prince Andrew had remained to command a Greek Army division embroiled in the Greco-Turkish War.
While still a university student, Kawabata re-established the Tokyo University literary magazine Shin-shichō ("New Tide of Thought"), which had been defunct for more than four years. There he published his first short story, "Shokonsai ikkei" ("A View from Yasukuni Festival") in 1921.
Most IRA officers on the ground interpreted the Truce merely as a temporary respite and continued recruiting and training volunteers. Nor did attacks on the RIC or British Army cease altogether. Between December 1921 and February of the next year, there were 80 recorded attacks by the IRA on the soon to be disbanded RIC, leaving 12 dead.