When did John Deere invent the tractor?
John Deere did not invent the tractor, unless you include the Dain tractor experiments. The John Deere company bought out the Waterloo Boy Tractor Company in Waterloo, Iowa and then John Deere started selling Waterloo Boy Tractors and then the Model D which the Waterloo Boy Company had been experimenting with for a few years. John Deere came late to the traction engine market (tractors) but bought out a company in order to start with income and land right away.