Question

At the conclusion of the Spanish-American War, _______________ had gained an empire and new stature in world affairs.

An important precedent set during _____________ was that the president had committed troops to battle without a congressional declaration of war.

Answer 1

Check this link for the first one:
http://en.wikipedia.org/wiki/Spanish%E2%80%93American_War

The second one is true for the Korean War.

Answer 2

Thank you.