[Home - Midwest Old Settlers & Threshers Association the midwest old settlers and threshers association was founded in mt. pleasant, iowa in 1950 with a gathering of 15 steam engines and 8 separators. the annual midwest old threshers reunion always held five days ending labor day, is one of the largest celebrations of our agricultural heritage from steam engine, tractors, cars & trucks, gas engines, horses, electric streetcars, and narrow gauge steam trains and attracts visitors across north america and around the world.]