Rodent Military Union, or also known as the RMU is a military union which was founded in 1928. The founder of the union was Ray Copper who was an engineer at the time. Currently there are 28 staff who work there, and over 400 students who are learning to be in the military. Financially the union is doing rather poor due to lack of money for to the budget. Their main competitor is Mouse Military Institution, and is currently losing because of RMU's budget cut in 2004. They have 30% of the union share, with MMI 60%, and 10% other. The union is free of charge for admission and is one of the most well known union in the Mech Mice colony.