Well, then you're not James Long, a wealthy military surgeon and war veteran. In the early 1800s he settled down in Mississippi, planning nothing more for his future than a quiet, Southern kind of life. Until ...
In 1819, America signed a treaty with Spain that would just let those sons of bitches have Texas! And all the U.S. got in return was freaking Florida. Long could do nothing but sit on his plantation, watching the events unfold and quietly seething in patriotic rage until he just couldn't take it anymore.
"What the f**k, arbitrary borderline? I thought we were friends!"
In 1820, Long finally snapped. He gathered several hundred followers and marched straight into Texas. His crew, rumored to be unofficially endorsed by the U.S. government, employed what was perhaps the simplest tactic in military history: They flat out walked in and took over the central town of Nacogdoches. There, they passed the declaration of independence for the newly formed Republic of Texas, elected Long for their president and proceeded to just settle in, establishing their own newspapers and customs rules and everything. While literally in the middle of the legal jurisdiction of a rather powerful and heavily armed European superpower.
This is a rip-off of something, but we're just not quite sure what.