This is a civil war poster put out by the Democrats during those festivities, with the obvious aim of demoralizing Lincoln's war effort. Notice that the American flag is flying upside down, an international sign of distress, while the confederate flag is flying battered but proud. Hatred of their own country, defeatism, divisiveness, all currently characteristic of the Democrat Party today. Some things never change.
Nathaniel Grigsby, a civil war veteran, died in April 1890. He had this put on his headstone:
Some things never change.