In 1843, Deere partnered with Leonard Andrus to produce more plows to keep up with demand. However, the partnership became strained due to the two men's stubbornness – while Deere wished to sell to customers outside Grand Detour, Andrus opposed a proposed railroad through Grand Detour – and Deere's distrust of Andrus' accounting practices. In 1848, Deere dissolved the partnership with Andrus and moved to Moline, Illinois, because the city was a transportation hub on the Mississippi River. By 1855, Deere's factory sold more than 10,000 such plows. It became known as "The Plow that Broke the Plains" and is commemorated as such in a historic place marker in Vermont.