'''Fleet Based''' is generally a term for refers to [[Space Marine]] chapters with no not based on a [[homeworld]]. They are sometimes naturally among the most mobile chapters. They possess only a fleet, one of the fleet ships usually serving as the [[Fortress Monastery]]. Some fleet-based Chapters are also called '''Crusade Chapters'''. A fleet based army stays on ships in lulls of battles, transporting, time in reserve etc. Many chapters who abandoned the [[Imperium]] only to rejoin rebelled at some point but were granted forgiveness are fleet based crusade chapters because they had were forced to forfeit their homeworld for their sins.

==Fleet Based -based Chapters==: