March 22
238 – Gordian I and his son Gordian II are proclaimed Roman emperors. 1508 – Ferdinand II of Aragon commissions Amerigo Vespucci chief navigator of the Spanish Empire. 1621 – The Pilgrims of Plymouth Colony sign a peace treaty with Massasoit of the Wampanoags. 1622 – Jamestown massacre: Algonquians kill 347 English settlers around Jamestown,...