1st Civ Div 

Short for 1st Civilian Division. The absolute best unit known to any military personnel. The place where a Marine rediscovers their individuality and actual self worth. No Gunnery Sergeant Shithead or Sergeant Major Good To Go anywhere to be seen.

GySgt Shithead "HEY DEVIL I KNOW ITS GOOD MORNING GUNNERY SERGEANT!!"
Devil Dog "Go fuck yourself I'm headed to the 1st Civ Div. Shove your proper greeting up your ass Gunny shithead"

1st Civ Div by Errrraaaahhh October 30, 2020

1st civ div 

In the military, specifically the US Marines, there are different divisions that Marines are assigned to - otherwise known as a unit on a large scale - such as the first division, etc.

The 1st civ div is a term for when a Marine is discharged and "joins the first civ div" as in becoming a "civ"ilian again.

Seargent Jones' contract ended. He just rejoined the 1st civ div.

1st civ div by K. Law October 23, 2007