1389: Ottomans defeat Serbian army in the bloody Battle of Kosovo, opening the way for the Ottoman conquest of Southeastern Europe. Large losses on both sides including Sultan Murad and Serbian leader Prince Lazar. (NS date)

1519: King Carlos I elected Holy Roman Catholic Emperor Charles V

1838: Coronation of Queen Victoria in Westminster Abbey, London

1919: Treaty of Versailles, ending WWI and establishing the League of Nations, is signed in France

2021: Tigray Defense Forces retake Tigray’s regional capital of Mekelle in Ethiopia’s Tigray War. The Ethiopian government declares a unilateral ceasefire to save face but neither side sticks to it.

Source: Onthisday.com