Irradiated NCR dogtag

 is a quest item in Fallout: New Vegas.

Characteristics
Found only on NCR Soldier Ghouls in Camp Searchlight, although sometimes those trooper ghouls can be found pretty far away from the Camp Searchlight. You need to collect 10 (9 + the one private Edwards at 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.