Why did Texas become a republic?

Texas became a republic primarily due to its struggle for independence from Mexico. Tensions escalated in the 1830s over issues such as governance, cultural differences, and the abolition of slavery, leading to the Texas Revolution in 1835-1836. Following their victory at the Battle of San Jacinto, Texas declared independence on March 2, 1836, and established itself as the Republic of Texas, which lasted until it joined the United States in 1845.