Vietnam                                                            
ARVN = Army Republic of Vietnam (former South Vietnamese Army).Police.
PAVN = People's Army of Vietnam (current Vietnamese Army)
NVA   = North Vietnamese Army 
NLF   = National Liberation Front
To avoid the fraudulent copy of some pieces of my collection,have altered the colors of some patches and badges.
Vietnam in-country embroidered patch featuring South Vietnamese ARVN National Police Special Reconnaissance team. lettering 'C-S-Q-G' (Canh Sat Quoc Gia = National Police), 'T-S D-B' (Trinh Sat Dac Biet = Special Recon Team). South Vietnam  Police academy  cap badge,, original pre-1975 manufacture.
Vietnam  police protection National Police
collar badge National Police Canh Sat-National  Police / South Vietnam 1975.
 Vietnam war era military police cap badge marked CA for Cong An  Police.) Vietnam war era -National Ppolice
'C A' stands for CONG AN (Police).
'C A' stands for CONG AN (Police). Vietnam  police protection
Vietnam  police protection