Challenger Recently sold its 20,000th track tractor. Caterpillar introduced its Mobil-trac system for its Challenger tractors in 1987, creating the first track tractors for agriculture. AGCO purchased the Challenger line from Caterpillar in 2002.

Along with the celebration of its 20,000th tractor, Challenger also announced that the big CAT logo will be reduced in size and will say “CAT power.” The 20,000th Challenger tractor was sold to D'Arrigo Brothers of California, a commercial vegetable farm that owns 16 Challenger tractors.