Both Jefferson Davis and Abraham Lincoln officially began their terms as president by

Both Jefferson Davis and Abraham Lincoln officially began their terms as president by giving inaugural addresses to their nations.

Explanation:

The purpose behind the inaugural addresses of Abraham Lincoln and Jefferson Davis was to remind people of their constitutional rights. In February 1861, just two months before the formal start of the Civil War, Jefferson Davis delivered his inaugural speech as his new representative to the Confederacy. Davis argued that the North exploited the South by disapproving of slavery, which is a custom that is important to its economy and culture.