In 1854 the British Admiralty ordered 4,000 Navy Model Colt revolvers. In 1855 the British Army placed an order for 5,000 of these revolvers for army issue. Despite a following order later in the year for an additional 9,000 revolvers, Colt failed to convince the British to adopt his revolver as the issue sidearm for the army. Colt began to realize that British sales were failing to meet his expectations. Unable to justify the London factory's expenses, Colt closed the London factory in 1856. Over the next few months his workmen crated and shipped the machinery and disassembled firearms back to America.