>>507046053 (OP)Antonio Lopez de Santa Anna dissolved the mexican government around 1834. This rendered previous treaties abrogated, even though santa anna wanted to pretend like dissolving their congress, and state congresses, was no biggie and it wasn't a new unrelated government. It's true Texas fought for independence from mexico, but it is exactly caused by the actions of santa anna. He created the legal framework that abrogated the map.
Here's a tip: Don't overthrow a government, if you like their international agreements.