Great Britain shared the general objective of the Monroe Doctrine, and even wanted to declare a joint statement to keep other European powers from further colonizing the New World. The British feared their trade with the New World would be harmed if the other European powers further colonized it. In fact, for many years after the doctrine took effect, Britain, through the Royal Navy, was the sole nation enforcing it, the U.S. lacking sufficient naval capability. The U.S. resisted a joint statement because of the recent memory of the War of 1812; however, the immediate provocation was the Russian Ukase of 1821 asserting rights to the Pacific Northwest and forbidding non-Russian ships from approaching the coast.