How did the Texan independence lead to the civil war?

Texan independence, achieved in 1836, heightened tensions between pro-slavery and anti-slavery factions in the United States. The annexation of Texas in 1845 as a slave state exacerbated these tensions, as it expanded the territory where slavery was permitted. This conflict over the extension of slavery into new territories contributed to the larger sectional divisions that ultimately led to the Civil War. Additionally, the desire to expand slavery into new states fueled the debate over states' rights and federal authority, further polarizing the nation.