Perhaps it's time to rewrite the Geneva Convention to allow the use of expanding bullets in combat. The idea of using "safer bullets" never made a lot of sense to me. Loaded with +p hollow points the 9mm will stop as well or better than a 45 FMJ.
Wrong Convention pal. The Geneva Convention deals with handling of prisoners. It is The Hague Convention that established rules for 'civilized' warfare. No poison gas, no expanding bullets, etc. The United States did not sign The Hague Convention, but we have generally adopted the restrictions.
A soldier should think long and hard about using illegal ammunition in a conventional war. Having such on ones person is not a ticket for fun if captured by the enemy.