William Walker (May 8, 1824 – September 12, 1860) was an American lawyer, journalist and adventurer, who organized several private military expeditions into Latin America, with the intention of establishing English-speaking colonies under his personal control, an enterprise then known as "filibustering." Walker became president of the Republic of Nicaragua in 1856 and ruled until 1857, when he was defeated by a coalition of Central American armies, principally Costa Rica's army. He was executed by the government of Honduras in 1860.