Complex sentence: Eaton resigned as Secretary of War on June 18,1831, and later received appointments that took him away from Washington, DC, first as Governor of Florida Territory from 1834 to 1836, and then as ambassador to Spain from 1836 to 1840.
Split into simpler sentences: Eaton resigned as Secretary of War on June 18,1831. Following his resignation, received appointments that took him away from Washington, DC, first as Governor of Florida Territory from 1834 to 1836, and then as ambassador to Spain from 1836 to 1840.