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The Treaty of 1818 between the US and Britain stated the Oregon Country would be jointly occupied by the US and Britain. But it resulted in disputes between Americans and British and another treaty, the Oregon Treaty, was signed in 1846. It stated the Oregon Country would be divided in two. The US would get all the land south of the 49th parallel (which eventually became the states of Washington and Oregon) and the British would get all the land north of the 49 parallel (which became British Columbia). Except for Vancouver Island off the coast of the Oregon Country, 4/5's of Vancouver Island was north of the 49th parallel so the US said Britain could have all of it instead of splitting it at the 49th parallel.
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In 1917 almost two million American soldiers arrived in Europe. These additional troops bolstered the European Allied forces and hurt the morale of German troops. The deployment of these American troops helped break holes in the German lines, and eventually the German's retreat. These additional troops provided the necessary manpower to help end the war
