Who: US, Cuba, Spain
What: Cuba had been fighting for independence from Spain and when the US intervened, war came about. The US battleship, Maine, was sent to Cuba to protect US citizens who had been caught up in the fighting there; however, the ship exploded. Americans blamed Spain, so they declared war.
When: Apr 1898 - Aug 1898
Where: Caribbean territories
Why: War broke out for many reasons: Maine incident, yellow journalism, a Christian mission, protect US business interests, desired land