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  2. United States in World War I - Wikipedia

    en.wikipedia.org/wiki/United_States_in_World_War_I

    The United States became directly involved in World War I after declaring war on Germany on April 6, 1917. The declaration ended nearly three years of American neutrality in the war since the beginning, and the country's involvement in the conflict lasted for eighteen months before a ceasefire and armistice were declared on November 11, 1918 .

  3. United States home front during World War I - Wikipedia

    en.wikipedia.org/wiki/United_States_home_front...

    During World War I, the United States saw a systematic mobilization of the country's entire population and economy to produce the soldiers, food supplies, ammunitions and money necessary to win the war. Although the United States entered the war in April 1917, there had been very little planning, or even recognition of the problems that Great ...

  4. American entry into World War I - Wikipedia

    en.wikipedia.org/.../American_entry_into_World_War_I

    Zimmermann invited Mexico (knowing their resentment towards America since the 1848 Mexican Cession) to join in a war against the United States if the United States declared war on Germany. Germany promised to pay for Mexico's costs and to help it recover the territory forcibly annexed by the United States in 1848.

  5. Selective Service Act of 1917 - Wikipedia

    en.wikipedia.org/wiki/Selective_Service_Act_of_1917

    Uncle Sam pointing his finger at the viewer in order to recruit soldiers for the American Army during World War I, 1917-1918 Sheet music cover for patriotic song, 1917. The Selective Service Act of 1917 or Selective Draft Act (Pub. L. 65–12, 40 Stat. 76, enacted May 18, 1917) authorized the United States federal government to raise a national army for service in World War I through conscription.

  6. History of the United States (1917–1945) - Wikipedia

    en.wikipedia.org/wiki/History_of_the_United...

    The history of the United States from 1917 to 1945 was marked by World War I, the interwar period, the Great Depression, and World War II. The United States tried and failed to broker a peace settlement for World War I, then entered the war after Germany launched a submarine campaign against U.S. merchant ships that were supplying Germany's ...

  7. Territorial evolution of the United States - Wikipedia

    en.wikipedia.org/wiki/Territorial_evolution_of...

    American Samoa was acquired by the United States in 1900 after the end of the Second Samoan Civil War. [5] The United States purchased the U.S. Virgin Islands from Denmark in 1917. [6] Puerto Rico and Guam remain territories, and the Philippines became independent in 1946, after being a major theater of World War II.

  8. 1st Pennsylvania Regiment - Wikipedia

    en.wikipedia.org/wiki/1st_Pennsylvania_Regiment

    Maryland and Virginia were to raise two companies each, and Pennsylvania was charged with raising six. However, Pennsylvania frontiersman were so eager to participate that, on June 22, Pennsylvania's quota of six was increased to eight, organized as a regiment known as the "Pennsylvania Rifle Regiment."

  9. Department of Pennsylvania - Wikipedia

    en.wikipedia.org/wiki/Department_of_Pennsylvania

    The Department of Pennsylvania (or General Patterson's Army) was a large military unit in the Union army at the outset of the American Civil War.Established on April 27, 1861, its territory consisted of Pennsylvania, Delaware, and all of Maryland not embraced in the Department of Annapolis (later renamed Department of Maryland) and the Department of Washington.