Final answer:
Abraham Lincoln appealed to unionists and the American people for support and unity in his speeches, while also touching on issues of slavery, reconciliation, and postwar changes including voting rights for black men.
Step-by-step explanation:
Abraham Lincoln, in his speeches and addresses, aimed to call to action the unionists and the American people to support the government and the Union during the Civil War. In his inaugural address, he tried to calm southern fears regarding slavery, denounced secession, and made pleas for reconciliation and the endurance of the Union. Furthermore, he sought to address the nation's obligation towards slaves and envisioned a postwar world that would include a process for reconciliation and hinted at extending voting rights to black men after the war. His addresses and policies emphasized the importance of national unity and the upholding of the Constitution, while also hinting at transformative changes that would come with the end of the war, such as the potential citizenship for former slaves.