 New Mexico Territory was eventually split in two states, New Mexico and Arizona, which were admitted in 1911–12, but this was long after the 13th Amendment had abolished slavery in all of the United States.The gap between the northern boundary of Texas on the parallel 36°30′ north and the southern boundaries of Kansas and Colorado on the parallel 37° north created the No Man's Land that later became the Oklahoma Panhandle in 1889.While a significant part of Nevada (containing Las Vegas) is south of 36°30′, at the time of the admission of Nevada in 1864, it was in the New Mexico Territory.