June 21
- 524 - Godomar, King of the Burgundians defeats the Franks at the Battle of Vezerone.
- 1621 - an execution of 27 Czech lords on the Old Town Square in Prague as a consequence of the battle on the "White Mountain".
- 1798 - Irish Rebellion of 1798: The British Army defeats Irish rebels at Battle of Vinegar Hill
- 1813 - Peninsular War: Battle of Vitoria.
- 1826 - Maniots defeat Egyptians under Ibrahim Pasha in the Battle of Vergas
- 1854 - First Victoria Cross won during bombardment of Bomarsund in the Aland Islands.
- 1859 - Italian Independence wars: Battle of Solférino is fought. Witnessed by Henri Dunant, the results were the Geneva Conventions and the Red Cross.
- 1864 - Maori Wars: The Tauranga Campaign ends.
- 1940 - World War II: France surrenders to Germany.
June 21
- 524 - Godomar, King of the Burgundians defeats the Franks at the Battle of Vezerone.
- 1621 - an execution of 27 Czech lords on the Old Town Square in Prague as a consequence of the battle on the "White Mountain".
- 1798 - Irish Rebellion of 1798: The British Army defeats Irish rebels at Battle of Vinegar Hill
- 1813 - Peninsular War: Battle of Vitoria.
- 1826 - Maniots defeat Egyptians under Ibrahim Pasha in the Battle of Vergas
- 1854 - First Victoria Cross won during bombardment of Bomarsund in the Aland Islands.
- 1859 - Italian Independence wars: Battle of Solférino is fought. Witnessed by Henri Dunant, the results were the Geneva Conventions and the Red Cross.
- 1864 - Maori Wars: The Tauranga Campaign ends.
- 1940 - World War II: France surrenders to Germany.