Juneteenth History Channel : Learn more about juneteenth, a celebration that commemorates the official end of slavery in the u.s.. Juneteenth (short for "june nineteenth") marks the day when federal troops arrived in galveston, texas in 1865 to take control of the state and ensure that . Juneteenth is the oldest nationally celebrated commemoration of the ending of slavery in the united states. Check out these interesting facts about the united states. Learn more about juneteenth, a celebration that commemorates the official end of slavery in the u.s. To celebrate juneteenth, artist ajuan mance is revisiting "the ancestors' juneteenth," a series that depicts historical black figures in . Dating back to 1865, it was on june 19th that . Juneteenth is the oldest nationally celebrated commemoration of the ending of slavery in the united states. Juneteenth, official name of federal holiday juneteenth national independence day, also called emancipation