July 4. July 4 is the 185th day of the year (186th in leap years) in the Gregorian calendar; 180 days remain until the end of the year. Events Pre-1600 362 BC ??? Battle of Mantinea: The Thebans, led by Epaminondas, defeated the Spartans. 414 ??? Emperor Theodosius II, age 13, yields power to his older sister Aelia Pulcheria, who reigned as regent and proclaimed herself empress (Augusta) of the Eastern Roman Empire. 836 ??? Pactum Sicardi, a peace treaty between the Principality of Benevento and the Duchy of Naples, is signed. 993 ??? Ulrich of Augsburg is canonized as a saint. 1054 ??? A supernova, called SN 1054, is seen by Chinese Song dynasty, Arab, and possibly Amerindian observers near the star Zeta Tauri. For several months it remains bright enough to be seen during the day. Its remnants form the Crab Nebula. 1120 ??? Jordan II of Capua is...