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| 1921, March 4–1923, Aug. 2 |
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| WARREN G. HARDING, 29th president. | 1 |
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| April 20 |
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| Colombian Treaty (See 1921, April 20) ratified by the Senate; the U.S. was to pay Colombia $25 million for the loss of Panama and to grant free access to the Panama Canal. | 2 |
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| May 19 |
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| Immigration Act signed, limiting the immigrants from a given country to 3 percent of the number of foreign-born persons of such nationality resident in the United States according to the U.S. Census of 1910. | 3 |
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| May 27 |
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| Emergency Tariff Act, raising duties on agricultural products, wool, and sugar. It placed an embargo on German dyestuffs; those products that could not be made in the U.S. were put on a licensing basis. | 4 |
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| Aug. 24 |
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| Treaty of peace signed with Austria. | 5 |
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| Nov. 12–1922, Feb. 6 |
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| WASHINGTON CONFERENCE. On Aug. 11 President Harding issued a call to Great Britain, France, Italy, and Japan to meet for discussion of naval limitation, and to the same powers, plus Belgium, Netherlands, Portugal, and China, for discussion of questions affecting the Pacific and the Far East. | 6 |
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