Answer:
World War I Germany's unfettered submarine warfare against American ships during World War I provoked the U.S. into abandoning the neutrality it had upheld for so many years. The country's resultant participation in World War I against the Central Powers marked its first major departure from isolationist policy.
Answer:
george washington necomes first u.s. president 1789
industrialization starts in the united states 1790
john adams becomes president 1797
thomas jefferson becomes president 1801
louisiana purchase 1803
james madison becomes president 1809
war of 1812
james monroe becomes president 1816
monroe doctrine issued 1823
andrew jackson becomes president1829
mexican american war 1846
seneca falls convention 1848
