what was the cause of monroe doctrine
âThe American continents â¦ are henceforth not to be considered as subjects for future colonization by any European powers.â. By the mid-1800s, Monroeâs declaration, combined with ideas of Manifest Destiny, provided precedent and support for U.S. expansion on the American continent. In the late 1800s, U.S. economic and military power enabled it to enforce the Monroe Doctrine.
George Bush did not invoke the Monroe Doctrine in 1989 in order to justify his intervention in Panama and the hunting down of the dictator Manuel Noriega, but the groundwork had been laid by Reagan.