3 ] Caterpillar's headquarters are located in Peoria, Illinois , United States . [ 1 ] Caterpillar machinery is recognizable by its trademark "Caterpillar Yellow" livery and the "CAT" logo. [ 9 ] Contents 1 History 1.1 Origins 1.2 Move to Peoria 1.3 Use in World War I 1.4 Post-war challenges