DALLAS (AP) — The origin of the Juneteenth celebrations marking the end of slavery in the U.S. goes back to an order issued as Union troops arrived in Texas at the end of the Civil War. It declared that all enslaved people in the state were free and had “absolute equality.” Word quickly spread of General Order No. 3 — issued on June 19, 1865, when U.S. Maj. Gen. Gordon Granger landed in the South Texas port city of Galveston — as troops posted handbills and newspapers published them.