Key Events

-President John Tyler used the Monroe Doctrine in 1842 to justify seizing Texas

_Secretary of State William H. Seward attempted a bizarre use of the doctrine in 1861 trying to avoid the Civil War, but that failed

-In the 1890s, the United States extended the Monroe Doctrine to include the right to decide between Great Britain and Venezuela about the boundaries of British Guiana

-The most significant extension came from Theodore Roosevelt, announcing that European nations would not be allowed to use force to collect debts to them from other Latin countries