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| 1917, March 30 |
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| The Russian provisional government declared in favor of an independent Poland, to include all lands in which the Poles composed a majority of the population. | 1 |
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| July 2 |
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| Pilsudski resigned from the council of state in protest against continued German control. He was thereupon arrested and imprisoned at Magdeburg (until Nov. 2, 1918). | 2 |
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| Aug. 15 |
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| Dmowski established the Polish national committee at Paris, the French government having given permission (June 4) for the formation of a Polish army in France. | 3 |
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| Oct. 15 |
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| The Germans set up a regency council in Poland that exercised effective control under German supervision. | 4 |
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