Present in North America in prehistoric times, the horse was reintroduced to the New World in the early 1500s by Spanish explorers and missionaries. Many escaped or were released to the wild, notably in the Pueblo Revolt of 1680, and became feral, with some of these herds finding their way to south Texas and elsewhere. As farmers, ranchers and other settled the state, the open range ended, and the Texas mustangs were tamed or driven to railheads and slaughterhouses.