1) Where is his basic training.
2) He seems to be a bit too young at 14 to fight in the Gulf War... (1990-91) and 20 years in the military I suppose Colonel would be possible but he's getting older. 18-joins military. About 6 months basic training, put on top of that officer training and any specialty training and you have a couple of years. So he would be at least in his early 20s to be an officer in the Gulf War, then working in the UN and such.
3) What about more recent conflicts? Afghanistan? Syria? Libya? 
4) What made him stand out for the SG program.