The final battle of what Nicaraguans call…

The final battle of what Nicaraguans call the "National War" (1856-57) takes place in the spring of 1857 in the town of Rivas, near the Costa Rican border.

Walker beats off the attacks of the Central Americans, but the strength and morale of his forces are declining, and it will be only a matter of time until he will be overwhelmed.

At this point, Commander Charles H. Davis of the United States Navy, whose ship had been sent to Nicaragua's Pacific coast to protect United States economic interests, arranges a truce.

On May 1, 1857, Walker and his remaining followers, escorted by a force of United States marines, evacuates Rivas, marches down to the coast, and take the ships back to the United States.