Possible Clues:

• Ex-GIs' org
• Org. with a She Serves outreach program
• Ex-combat GIs' gp
• Post letters
• Org. concerned with the GI Bill
• Org. for some ex-GIs
• Org. in whose halls heroes might congregate
• Org. for ex-G.I.s
• ''Find a Post'' search offerer
• Service org. with posts