When did Lincoln propose the Thirteenth Amendment? before the outbreak of the Civil War
at the conclusion of the Civil War
prior to the Emancipation Proclamation
during his 1864 presidential campaign

Examine these two paintings that depict famous events from american history. the image on the left, painted in 1940, shows the signing of the u.s. constitution in 1787. the image on the right, painted in 1836, shows the american victory at the battle of yorktown in 1781.which of these paintings should be considered a secondary source?