If I remember correctly I have quoted one in the attached paper.

Also, here is the abstract about a person who became a known soul carer after 5 years in war. The book is, helas, written in Swedish:

Abstract

Erik Ewalds spends five years in the Finnish wars between 1940-to 1944: winter war, armistice and continuation war. He is summoned to military service on January 17, 1940, and is unarmed during the winter war. On January 20, he writes his first letter to the 17-year-old Gunvor Hällfors. Their war experiences are documented on over 4,000 handwritten letter pages, postcards and telegrams along with military passports, study books and other sources. Erik Ewalds studies theology and psychology at the University of Helsinki; he is replacing the battalion priest from March 7 to June 2, 1942. During this time, Erik feels that he is obliged to God to convey his nonviolence conviction and pacifism in accordance with the Bible's commandment. “Thou shalt not kill". Thus, he becomes the target of the rage of the officers - hatred - according to some. He was then threatened with Marshall court. (Pekurinen was killed based on his pacifistic conviction which led to Lex Pekurinen). Themes are reflected in Erik Ewalds’ narratives along with his own analyzes, which are commented in the order they are presented in the correspondence. His analyzes are based on current feelings, conflicts and mental sufferings relative to ongoing university studies in theology and psychology. The main theme 'Thou shalt not kill' is related besides to theology and psychology to psychodynamics. The soldiers’ physical sufferings along with war medical undertakings are described. Psychiatric disorders and post-traumatic symptoms are observed in details and the development of C-PTSD is elucidated. Soul care for soldiers as well as for their

Hello Emily,

Have you seen these?:

Taylor, M. K., Stanfill, K. E., Padilla, G. A., Markham, A. E., Ward, M. D., Koehler, M. M., ... & Adams, B. D. (2011). Effect of psychological skills training during military survival school: a randomized, controlled field study. Military medicine, 176(12), 1362-1368.

https://www.researchgate.net/profile/Marc_Taylor/publication/221836062

Robson, S., & Manacapilli, T. (2014). Enhancing performance under stress: Stress inoculation training for battlefield airmen. RAND PROJECT AIR FORCE SANTA MONICA CA.

https://www.rand.org/content/dam/rand/pubs/research_reports/RR700/RR750/RAND_RR750.pdf

These are reviews, but there might be some relevant research cited:

The first is a dissertation:

Taylor, A. H. (2012). Assessing the effects of stress resilience training on visual discrimination skills: Implications for perceptual resilience in US warfighters. Virginia Commonwealth University.

https://scholarscompass.vcu.edu/cgi/viewcontent.cgi?article=3744&context=etd

Thompson, M. M., & McCreary, D. R. (2006). Enhancing mental readiness in military personnel. DEFENCE RESEARCH AND DEVELOPMENT TORONTO (CANADA).

https://www.researchgate.net/publication/242077161

Crawford, C., Wallerstedt, D. B., Khorsan, R., Clausen, S. S., Jonas, W. B., & Walter, J. A. (2013). A systematic review of biopsychosocial training programs for the self-management of emotional stress: potential applications for the military. Evidence-Based Complementary and Alternative Medicine, 2013.

https://www.researchgate.net/profile/Joan_Walter/publication/258205149

Gibbons, S. W., Hickling, E. J., & Watts, D. D. (2012). Combat stressors and post‐traumatic stress in deployed military healthcare professionals: An integrative review. Journal of advanced nursing, 68(1), 3-21.

https://www.researchgate.net/publication/51185924

I can send a full text of this if you are unable to access it.

York, A., Crawford, C., Walter, A., Walter, J. A., Jonas, W. B., & Coeytaux, R. (2011). Acupuncture research in military and veteran populations: A rapid evidence assessment of the literature. Medical Acupuncture, 23(4), 229-236.

https://www.researchgate.net/publication/275200039

MC USAR, B. R. (2011). Overview of outcome data of potential meditation training for soldier resilience. Military medicine, 176(11), 1232.

https://msrc.fsu.edu/system/files/Rees%202011%20Overview%20of%20outcome%20data%20of%20potential%20meditation%20training%20for%20soldier%20resilience.pdf

Hammermeister, J., Pickering, M., & Lennox, A. (2011). Military applications of performance psychology methods and techniques: An overview of practice and research. The Journal of Performance Psychology, 3.

http://www.centerforperformancepsychology.org/assets/resources/pageResources/The-Journal-of-Performance-Psychology-Issue-Three.pdf

Very best wishes,

Mary

http://psycnet.apa.org/record/2011-00087-005

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4945176/

Thanks everyone for your suggestions, its been a huge help!