United States in World War I 11 approximately 10,000 fresh soldiers were arriving in France daily. In 1917, Congress gave US citizenship to Puerto Ricans when they were drafted to participate in World War I, as part of the Jones Act. In the end, Germany miscalculated the United States' influence on the outcome of the conflict, believing it would be many more months before US troops would arrive and overestimating the effectiveness of U-boats in slowing the American buildup. The United States Navy sent a battleship group to Scapa Flow to join with the British Grand Fleet, destroyers to Queenstown, Ireland and submarines to help guard
Military history of the United States during World War II Australian forces were combined under the ABDA command but its fleet was quickly sunk in several naval battles around Java. Following their rapid advance, the Japanese started the Solomon Islands Campaign from their newly conquered main base at Rabaul in January 1942. The Japanese seized several islands including Tulagi and Guadalcanal, before they were halted by further events leading to the Guadalcanal Campaign. This campaign also converged with the New Guinea campaign. In May 1942, the United States fleet engaged the Japanese fleet during the first battle in history in which neither fleet fired directly on the other, nor did