Missouri War (1812 Closure)

In the aftermath of the disintegration of the USA in the 1820s, 2 new country (the CSS and the FRA)considered themselves it's true successor state.

The major sticking point between the 2 countries was the ownership of the Louisianan territory. While the FRA) had troops loyal to itself already in the territory, the government was incapable to send reinforcement due to a lack of land bridge as the CSS army lauch an all out attack.

The war ended with a victory for the CSS who quickly integrated the territory as states.