Missouri Territory
With the state of Missouri carved out of the Missouri Territory, the Missouri Territory was left unorganized territory. In June 1834, the boundaries of the Michigan Territory were expanded to incorporate what remained of the old Missouri Territory. Just two years later, Congress split the current state of Michigan from the Michigan Territory in preparation for Michigan's entry into statehood, and renamed the territory the Wisconsin Territory. In June 1838, Congress split the Wisconsin Territory in two: What would become the modern state of Wisconsin remained the Wisconsin Territory, while the remainder of the territory was now called the Iowa Territory. The modern state of Iowa was created on December 28, 1846 (with the remaining territory becoming unorganized again until the creation of the Minnesota Territory on March 3, 1849).