Manifest Destiny By taliaferoemily Period: Jan 20, 1803 to Jan 20, 1867 Manifest Destiny Apr 30, 1803 louisiana purchase We bought it for15 million dollars Feb 20, 1848 mexican cession We bought this land for 15 million dollars. Dec 30, 1853 Gasden Purchase We bought this land fro 10 million dollars Mar 30, 1867 Alaskan Purchase We bought this land for 7.2 million dollars.