11th » The Naval Battle of Riachuelo is fought on the rivulet Riachuelo (Argentina), between the Paraguayan Navy on one side and the Brazilian Navy on the other. The Brazilian victory was crucial for the later success of the Treaty of the Triple Alliance called
19th » Over two years after the Emancipation Proclamation, slaves in Galveston, Texas, United States, are finally informed of their freedom. The anniversary is still officially celebrated in Texas and 41 other contiguous states as Juneteenth.
23rd » American Civil War: at Fort Towson in the Oklahoma Territory, Confederate States of America or Confederate, Brigadier General (CSA) Brigadier general or Brigadier General Stand Watie surrenders the last significant rebel army.