The Military Order of Saint Benedict of Aviz, previously to 1910 Royal Military Order of Saint Benedict of Aviz, previously to 1789 Knights of Saint Benedict of Aviz or Friars of Santa Maria of Évora, is a Portuguese order of chivalry, founded in Portugal in 1146. It gave its name and coat of arms to the Aviz Dynasty that ruled Portugal between 1385 and 1580.

The Battle of Tangier, sometimes referred to as the siege of Tangiers, and by the Portuguese, as the disaster of Tangier, refers to the attempt by a Portuguese expeditionary force to seize the Moroccan citadel of Tangier and its defeat by the armies of the Marinid Sultanate in 1437.