america natural resource changes. By ritterbr2 Aug 3, 1492 Christopher Columbus Christopher Columbus set sail from spain in a atempt to find a water path to india. May 5, 1493 Christopher Columbus landed Christopher Columbus landed in the new world and me the what he thoght were indains. Period: Feb 9, 1775 to Feb 4, 1783 American Revolution america rebeeled the british in a long eight year war with the americans winning. Period: Jan 9, 1861 to Jan 29, 1861 states left america 6 states left america and many more started to do the same. Period: Jan 31, 1862 to Feb 3, 1865 cival war president licons declared war after a long many year long war the north won.