Summer vacations usa for S. Maine. While visiting Havana, Cuba, the American battleship was blown up, killing 260 American sailors. Although the cause of the explosion was unknown, it moved Americans to rally against Spain and mobilize for war. Inspired by the call to arms”Remember the Maine!”the American victory over Spain was easy and quick. Only 379 of the nearly 280,000 men who served in the American armed forces died from enemy action. The financial cost of the war was also small, amounting to roughly $250 million. Summer vacations usa 2016.