Why did the mexican army re-invade texas in 1842

Mexico did not have that many resources so their government forced them to invade Texas.

Explanation:

The government  intended discourage immigration and foreign capital investment in the young republic.

Mexican leaders periodically threatened to renew hostilities against Texas.

Explanation:

The most immediate cause of the Texas Revolution was the refusal of many Texas, both Anglo and Mexican, to accept the governmental changes mandated by "Siete Leyes" which placed almost total power in the hands of the Mexican national government and Santa Anna. ... Many Mexicans felt exactly the same way.

Ace Carlos

kind of thinking it would be c hope this out