 Gygax left Guidon Games in 1973 and, with Don Kaye as a partner, founded the publishing company Tactical Studies Rules (later known as TSR, Inc.) in October. The two men each invested US $ 1,000 in the venture — Kaye had borrowed US $ 1,000 on a life insurance policy — in order to finance the start-up of TSR. However, this did not give them enough capital to publish the rules for Dungeons & Dragons, and they worried that other companies would be able to publish similar projects first. The two convinced acquaintance Brian Blume to join TSR in December 1973 as an equal one-third partner. This brought the financing that enabled them to publish D & D. Gygax worked on rules for more miniatures and tabletop battle games, including Cavaliers and Roundheads (English Civil War, with Jeff Perren), Classic Warfare (Ancient Period: 1500 BC to 500 AD), and Warriors of Mars.
