Col "Name" (RET) for Air Force and Marine Corps, COL "Name" (RET) for Army.
I think it is Lt Col (ret). Verify to be sure.
You can address a retired colonel as "Colonel (Last Name)" and his wife as "Mrs. (Last Name)" or "Colonel (Last Name) and Mrs. (Last Name)" in the salutation of a letter.
colonel
PPL is the abbreviation or 'IM' for people
retired air force signature block
35000
retmnt
ret. or Ret.
1SG (ret)
LTC or Lt. Col In relation to Civil War, I have seen it written Lieut.-Colonel which is not much of an abbreviation and Lt-Col.
The cast of The Adventure of the Retired Army Colonel - 1912 includes: Maurice Costello as Lambert Chase - the Detective Van Dyke Brooke as Morrison - the Retired Army Colonel Robert Gaillard as Prior - the Police Constable Edward Thomas as The Chief of Police
1SG (ret)