Irradiated NCR dogtag

 is a quest-related item in Fallout: New Vegas.

Characteristics
Found only on NCR Soldier Ghouls in Camp Searchlight. (Sometimes those trooper ghouls can be found pretty far from the Camp Searchlight.) You need to collect 10 (9 + the one private Edwards (Camp Searchlight) has) for the quest We Will All Go Together. The dogtags are quest items and cannot be sold to a merchant or anything else, only given to the quest giver.