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Alfred Thayer Mahan was a United States naval officer and historian -
The Spanish–American War was a period of armed conflict between Spain and the United States. -
the policy of forcefully extending a nation's authority by territorial gain or by the establishment of economic and political dominance over other nations. expansionism is the policy, of a nation, of expanding its territory or its economic influence. -
the assassination of Archduke Franz Ferdinand of Austria-Hungary was the leading/major cause of ww1 -
the Panama canal was built on August 15, 1914. it was built for ships to pass between the Atlantic and Pacific Oceans. this canal had a good impact like improving global transportation -
commander in chief of the American Expeditionary Force. he became this position in 1917 -
Germany's resumption of submarine attacks on passenger and merchant ships -
one of the most decorated United States Army soldiers of World War I. he was drafted on June 5th 1917