Mons Officer Cadet School was a British military training establishment for officer cadets in Aldershot from 1942 to 1972, when it was closed and all officer training concentrated at Sandhurst. The training course at Mons was for National Service and Short Service Officer Cadets, Territorial Army officers, and those joining the Regular Army as graduates, except for infantry officers. It was relatively short, usually lasting only six months or even less, compared with two years at Sandhurst. Source: Wikipedia (en)