Causes of WW1 before the U. S involvement?

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Explanation:

U.S. Entry into World War I, 1917. ... Wilson cited Germany's violation of its pledge to suspend unrestricted submarine warfare in the North Atlantic and the Mediterranean, as well as its attempts to entice Mexico into an alliance against the United States, as his reasons for declaring war

1.a)britain

2.b)spain

3.c)french

4.d)portugal

explanation:

it increase by 12% a year from 1812-1820