different issues for psychologists

This week, please write 5 pages discussing the different issues for psychologists/psychiatrists from WWI, WWII, and the Vietnam conflict.

Based on your research and present knowledge, what are the modern day challenges for military psychiatrists/psychologists?

Or in other words: please contemplate whether military psychiatrists from WWI, WWII and the Vietnam War faced similar or different issues and challenges. Then, please compare those issues and challenges to modern day issues and challenges of military psychologists.

Please make sure to provide at least TWO citations.