bankrupt Colean Manufacturing Co. in 1910, shows how the plant looked while track-type tractors were being assembled. Date 1910 ( 1910 ) Source Photos Courtesy Caterpillar Corporate Archives; g2e22e2000000000000fe491bcf8cec34f06470509c6e6a91a76e1c5b72.jpg accompanied Gordon, Paul: "Cat hits 100-year milestone: Holt Caterpillar started operations in East Peoria in 1910 with 12 employees" , Peoria Journal