From Lexicanum

Crusade is the Imperial term given for a very large-scale military campaign undertaken by Imperial forces in order to conquer several worlds in one offensive. Crusades are usually broad enough in scope to involve several worlds and many smaller-scale campaigns. They also often involve more than one branch of the Imperial military, in which case they are led by a Warmaster or an officer of sufficient rank to command multiple arms of the Imperial military.

The first Crusade is considered to be the Emperor's Great Crusade which created the Imperium. The Chaos counterpart to an Imperial Crusade is known as a Black Crusade.

Named Crusades

• Black Crusades
  • 1st Black Crusade
  • 2nd Black Crusade
  • 3rd Black Crusade
  • 4th Black Crusade
  • 5th Black Crusade
  • 6th Black Crusade
  • 7th Black Crusade
  • 8th Black Crusade
  • 9th Black Crusade
  • 10th Black Crusade
  • 11th Black Crusade
  • 12th Black Crusade
  • 13th Black Crusade
• 519th Crusade
• Altid Crusade
• Corinthian Crusade
• Damocles Crusade
• Declates Crusade
• Geonide Crusade
• Great Crusade
• Hive Thetus Crusade
• Jerulas Crusade
• Macharian Crusade
• Nimbosa Crusade
• Crusade of the Ophidium Gulf
• Palatine Crusade
• Sabbat Worlds Crusade
• Ullanor Crusade
• Vinculus Crusade
• Wars of Apostasy (Terran Crusade)