The document discusses Texas and the events leading up to its secession from the Union and joining the Confederacy during the Civil War era. It describes growing divisions between the North and South over issues like slavery, states' rights, and tariffs. Key people and events mentioned include the Dred Scott decision, John Brown's raid, the election of Abraham Lincoln, other southern states seceding, and Sam Houston's opposition to secession and removal from office for refusing to swear allegiance to the Confederacy.