4. What was a reason for Texas involvement in the Civil War? F. The Texas economy, social structure, and political values were much like the northern states. G. Texans believed that the U.S. government should intervene more in economic decisions. H. Texans depended on slave labor for its heavy cotton production. J. Texarts wanted the 13th Amendment added to the U.S. Constitution. 5. Counties for secession Counties against secession