GI / cccccc (GI over 6 c) is the clue. Can you make the correct phrase out of this?
What is GI Overseas : As per Wikipedia, G.I. is initials used to portray the officers of the United States Army and aviators of the United States Air Forces and furthermore for general things of their equipment.
So GI Overseas means such officer in overseas.
Also, some of the similar rebus puzzle pictures portray 7 c in the clue. That is GI over 7 c. But the answer remains the same.