The <a href="https://en.wikipedia.org/wiki/Mississippi_Territory" id="mwbg" rel="mw:WikiLink" title="Mississippi Territory">Mississippi Territory</a> is organized from disputed territory claimed by both the <a href="https://en.wikipedia.org/wiki/United_States" id="mwbw" rel="mw:WikiLink" title="United States">United States</a> and the <a href="https://en.wikipedia.org/wiki/Spanish_Empire" id="mwcA" rel="mw:WikiLink" title="Spanish Empire">Spanish Empire</a>. It is expanded in 1804 and again in 1812.