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| 1920, Jan. 17 |
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| Presidential election. Clemenceau was defeated by Paul Deschanel, a reflection of public opinion that held the Treaty of Versailles too lenient. | 1 |
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| April 23 |
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| Joseph Caillaux, former prime minister, sentenced to three years' imprisonment and other penalties after conviction of dealings with the enemy. He was amnestied in Nov. 1924. | 2 |
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| Sept. 15 |
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| Resignation of President Deschanel on account of ill health. | 3 |
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| Dec |
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| Having already voted to leave the Second International (Feb.), the Socialist Party at its party convention in Tours split over joining the Third International. Over three-fourths voted for adhesion, leaving a minority led by Léon Blum to secede. The majority renamed themselves the French Communist Party. | 4 |
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