Crusader Medallions
From Warhammer 40k - Lexicanum
Crusader medallions are either symbols painted onto the greaves or braces of a Battle-Brother's power armour or medals fixed to his weapons, chest plate, or helmet. The presence of these tokens marks out the Battle-Brother as a crusader and will increase the respect of his peers, though it can also alienate others as every crusade comes with both great victories and bitter defeats.
Many members of the Marines Errant have been part of an Imperial crusade at some point during their lifetimes. Those that come to the Deathwatch are usually veterans of such glorious endeavours and wear the badges of their valour on their armour. [1]
Source
- 1: Deathwatch: Honour the Chapter, pg. 49
