English: Map showing the boundary between the United States and Spanish Florida as set by "Pinckney's Treaty"—signed on October 27, 1795 and became effective on August 3, 1796—at 31°N; also shown is the portion of Spanish West Florida between 31°N and 32° 22′, which Spain relinquished its claim to in the treaty. On April 7, 1798, Congress organized the region as the Mississippi Territory.^[1]