The Ford Bronco is a sport utility vehicle that was produced from 1966 through 1996, with five distinct generations. Broncos can be divided into two categories: early Broncos (1966–1977) and full-size Broncos (1978–1996). The Bronco was introduced in 1966 as a competitor to the small four-wheel-drive compact SUVs such as the Jeep CJ-5 and International Harvester Scout, and built on its own platform. A major redesign in 1978 moved the Bronco to a larger size, and it was built using a shortened Ford F-Series truck chassis to compete with the similarly adapted Chevrolet K5 Blazer.