That cross looks like a Christian symbol rather than dividing the shield into quarters. The diamond reminds me of a suit of cards, but the star suggests this is not the case. Military unit insignia would fit, but a badge would be unlikely to include two different military units on the same badge. A fraternal organization badge might work or a non-affiliated decorative badge with random symbols might also fit. I would give more weight to a fraternal organization badge and exhaust that avenue first. I could be totally wrong but it's just a thought.