August 9, 1930 – Betty Boop made her cartoon debut in Dizzy Dishes.
August 10, 1519 – Ferdinand Magellan's five ships set sail from Seville to circumnavigate the globe.
August 11, 1929 – Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio.
August 12, 30BC – Cleopatra VII Philopator, the last ruler of the Egyptian Ptolemaic dynasty, commits suicide, allegedly by means of an asp bite.
August 13, 1918 – Women enlist in the United States Marine Corps for the first time. Opha Mae Johnson is the first woman to enlist.
August 14, 1880 – Construction of Cologne Cathedral, the most famous landmark in Cologne, Germany, is completed.