The executions, and Jackson's invasion of territory belonging to Spain, a country with which the U.S. was not at war, created an international incident. Many in the Monroe administration called for Jackson to be censured. Jackson's actions were defended by Secretary of State John Quincy Adams, an early believer in Manifest Destiny. When the Spanish minister demanded a "suitable punishment" for Jackson, Adams wrote back, "Spain must immediately [decide] either to place a force in Florida adequate at once to the protection of her territory ... or cede to the United States a province, of which she retains nothing but the nominal possession, but which is, in fact ... a post of annoyance to them." Adams used Jackson's conquest, and Spain's own weakness, to get Spain to cede Florida to the United States by the Adams-Onís Treaty. Jackson was subsequently named military governor and served from March 10, 1821 to December 31, 1821.