The United States had a long history of intervening in Liberia's internal affairs, and had repeatedly sent naval vessels to help suppress insurrections by indigenous tribes before and after independence (in 1821, 1843, 1876, 1910, and 1915). However, the United States had lost interest in Liberia after 1876 (the end of Reconstruction), and the country instead became closely tied to British capital. Starting in 1909, the U.S. once again became heavily involved in Liberia. By 1909, Liberia faced serious external threats to its sovereignty over unpaid foreign loans and border disputes.