At the outbreak of the Civil War, Hancock strongly believed that Texas should remain part of the
Union. In 1860 he was elected to the
Texas House of Representatives as a
Unionist. After the secession of Texas in March 1861, he refused to take the oath of allegiance to the
Confederate States of America and was expelled from the legislature. During the Civil War he practiced law in the state courts but refused to conduct business or recognize the authority in the Confederate courts. He refused to take part in military service during the war, and in 1864 he fled to
Mexico to escape conscription for the Confederacy. After the end of the war he returned to Texas and took part in the restoration of order, including serving as a delegate to the state
constitutional convention in 1866. ==Post war years==