Conversation so far:
which country provides costa rica with an army
Costa Rica maintains alliances with other countries, such as the United States, that can be expected assist in the event of war.
Did Costa Rica ever have an army?
In 1948 a rebel group called National Liberation Army commanded by caudillo José Figueres Ferrer led a rebellion against the Costa Rican government.
Who won the Costa Rican Civil War?
José Figueres Ferrer's rebel army quickly defeated the government of President Teodoro Picado.
What transpired after Ferrer's army defeated Costa Rican governmental forces?
After the war, Ferrer ruled for a year and a half as with a junta which abolished the military and oversaw the election of a Constitutional Assembly.

Question: So there has been no war since?
Self-contained rewrite: There hasn't been wars in Costa Rica since the Civil War?