5th » Mary Kies becomes the first woman awarded a U.S. patent, for a technique of weaving straw with silk and yarn known as thread.
5th » The Swiss Cantons of Switzerland named canton of Aargau denies citizenship to Jews.
21st » The first day of the Battle of Aspern-Essling between the Austrian army led by Archduke Charles, Duke of Teschen known as Archduke Charles and the French army led by Napoleon named Napoleon I of France sees the French attack across the Danube held.
22nd » On the second and last day of the Battle of Aspern-Essling (near Vienna, Austria), Napoleon I is repelled by an enemy army for the first time.
25th » Chuquisaca Revolution: a group of Patriot (Spanish American Revolution) named patriots in Chuquisaca (modern day Sucre) revolt against the Spanish Empire, starting the South American Wars of Independence.