May 9:
1457 B.C.: The Battle of Megiddo between Thutmose III's Epyptian forces and a Canaanite army. This is the earliest battle that has been recorded in reliable detail.
A.D. 328: St. Athanasius is appointed bishop of Alexandria.
A.D. 1386: The Treaty of Windsor between England and Portugal. This is the oldest diplomatic alliance in the world that is still in force.
A.D. 1502: Columbus leaves Spain on his fourth voyage to the New World.