The term "Terran diplomatic mission to Menem" is a catchall term designation to describe contact between Earth and Menem, and the presence of Terrans on Menem, prior to the formation of the Union of Human Worlds. It describes the initial uncrewed communications via probes launched by each planet; the subsequent arrival, on three occasions, of crewed Terran ships; and the combined activities of Terran scientists and diplomats on Menem during this period.