Coleshill Auxiliary Research Team (CART) is a network of British historians. It is named after Coleshill in Oxfordshire where Winston Churchill had arranged for a group of soldiers, called Auxiliary Units, to spend their time, developing guerrilla war tactics for in the event of a Nazi invasion of England during World War II. CART is one of a number of groups researching this army and have put together a national database listing the 3,500 men.