Which is what I stated in my post. Slavery was still legal in some Union States until the ratification of the 13th ammendment in December of 1865. Juneteenth was not the end of slavery in America.
With some 200,000 blacks in the U.S Army in 1865 (3/4 from the South), slavery was pretty much dead everywhere -- legal or not -- under control of the U.S. Government, which by then was the entire country except Texas, which was not reached by U.S. troops until June 19th -- the day celebrated as Juneteenth.