Fort Stikine was a fur trade post and fortification in what is now the Alaska Panhandle, at the site of the present-day of Wrangell, Alaska, United States. Originally built as the Redoubt San Dionisio or Redoubt Saint Dionysius (Russian: Форт or Редут Святого Дионисия, r Fort or Redut Svyataya Dionisiya) in 1834, the site was transferred to the British-owned Hudson's Bay Company as part of a lease signed in the region in 1838, and renamed Fort Stikine when turned into a Hudson's Bay Company post in 1839. The post was closed and decommissioned by 1843 but the name remained for the large village of the Stikine people which had grown around it, becoming known as Shakesville in reference to its ruling Chief Shakes by the 1860s. With the Alaska Purchase of 1867, the fortification became occupied by the US Army and was renamed Fort Wrangel, a reference to Baron von Wrangel, who had been Governor of Russian America when the fort was founded. The site today is now part of the city of Wrangell.
By a decree of Emperor Paul I known as the Ukase of 1799, the Russian Empire asserted ownership of the Pacific coast and adjoining lands of North America as far south as the 55th degree of latitude, with Novo-Arkhangelsk (modern Sitka) founded shortly thereafter. In 1821, Emperor Alexander issued another ukase which extended the Russian claim south to 51 degrees north, also forbidding foreign vessels from approaching within 100 Italian miles of any Russian settlement. Other powers protested and the line was withdrawn to "the line of the Emperor Paul", 55 degrees north, with parallel treaties with the United States and Great Britain (in 1824 and 1825 respectively) adjusting that southwards slightly to 54 degrees 40 minutes north so as to include all of Prince of Wales Island within Russian territory.