The original land allocated to the Nebraksa territory included everything that was left of the original Louisiana Purchase which was north of the current Kansas-Nebraska border. Some land east of the Missouri River was removed by Congress in 1859, and left unorganized until it was eventually attached to Iowa. Colorado Territory took a portion of Nebraska Territory in 1861; that land later became part of Wyoming. Dakota Territory took everything north of the 43rd parallel; Idaho Territory was given everything west of the 127th meridian.