Individual Marking
From Battleground Europe Wiki
Within the same Country and Branch, anything a player spawns will have the same marking. For example, if you spawn in the French Army with a Blue Diamond and the number 5 on your hull, every time you spawn any vehicle in the French Army, it will have that marking. If the turret of your German tank shows 232, all your German tanks will display 232.
These markings are not completely unique, given the possible marking options and the large numbers of accounts that have existed for the game.
Example: Oldzeke.
Here you see Oldzeke spawned into a German 109.
His Individual Marking is a Yellow 6. Every Luftwaffe aircraft he spawns will display a Yellow 6. So, if you happen to encounter one, it might be him. His brigade (actually Gruppe) marking shows that on this sortie, he was part of Jagdgeschwader 2 'Richthofen' I Gruppe. The decal shows that he attended the 2007 Battleground Europe Con (although in Open Beta, everyone has this decal assigned for testing purposes, so he might not have been there).
NOTE: Infantry and Navy do not have Individual Markings at this time.
