Final answer:
Antonio Lopez de Santa Anna's significant decision to lead Mexican troops into Texas is notably tied to him overturning Mexico's Constitution, fostering conditions that precipitated the Texas Revolution.
Step-by-step explanation:
The significant aspect of Antonio Lopez de Santa Anna's decision to lead Mexican troops into Texas is that he had previously nullified Mexico's constitution. Santa Anna overthrew the Mexican Constitution of 1824 in favor of the Siete Leyes which centralized governmental power and reduced democratic freedoms, leading to the Texas Revolution and eventual declaration of independence from Mexico.
His role as a central figure in the tensions between Texas and the Mexican government clearly demonstrates his influence on the political landscape of the time.