1. The issue of slavery: Slavery was a fundamental point of contention between the Northern and Southern states of the United States. Texas, as a slave state, felt its economy and social structure were being threatened by the growing abolitionist movement and the influence of the free states in the US Congress.
2. The Compromise of 1850: The Compromise of 1850 was a series of laws passed by the US Congress to resolve the issue of slavery in the territories acquired from Mexico after the Mexican-American War. The compromise included the admission of California as a free state, the creation of the territories of Utah and New Mexico without specific provisions on slavery, and the Fugitive Slave Act, which required the return of escaped slaves to their owners. Texans were dissatisfied with the Compromise, particularly with the Fugitive Slave Act, as they felt it violated state's rights and endangered the institution of slavery.
3. The election of Abraham Lincoln: The election of Abraham Lincoln, who was seen as an opponent of slavery, to the presidency in 1860 was considered by many Southerners as a direct threat to their way of life and the existence of slavery. The election solidified fears and anxieties about the future of slavery in the United States.
4. States' rights and tariffs: Texans had long been advocating for states' rights and opposed what they perceived as excessive federal intervention and taxation. The debate over tariffs, specifically the Morrill Tariff of 1861, which imposed higher duties on imported goods, further strained relations between Texas and the federal government.
5. The seizure of Union property: In February 1861, the Texas State Convention called for the seizure of all US military assets and federal property within Texas. Federal forts, such as Fort Sumter, were particularly targeted. This act was seen as an overt challenge to federal authority and contributed to the escalating tension between Texas and the United States.
It's important to note that the secession of Texas was not the result of a single event but rather a culmination of various factors related to slavery, states' rights, economic issues, and political disagreements between Texas and the federal government.