What date did Congress declare war on Spain?

Congress declared war on Spain on April 25, 1898, marking the official commencement of the Spanish-American War. This decision came after increasing tensions and conflicts between the United States and Spain, particularly following events such as the explosion of the USS Maine in Havana Harbor. The declaration was part of a broader movement in the United States toward imperialism, as the country sought to expand its influence and territory. The war ultimately resulted in significant territorial gains for the U.S., including Puerto Rico, Guam, and the Philippines, altering the dynamics of international relations and colonial power in the late 19th century.

The other options do not pertain to the declaration of war against Spain; for instance, April 2, 1917, marks the date when the U.S. entered World War I, a conflict unrelated to the Spanish-American War.