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Here is a nih study:
The US Army invests significant time and money in training its leaders. Individuals who choose the Army Infantry as their career expend significant time, energy, and commitment to self-development to achieve their career goals. Omega-3 HUFAs, specifically DHA are concentrated in neural tissues, are essential for neural function [2], and must be obtained from dietary sources. US food production practices over the last century have resulted in a dramatic change in the fatty acid profile of the US diet. At the same time, evidence continues to build regarding the potential importance of omega-3 HUFAs on emotional state, cognitive function and mental health. US military personnel frequently have low omega-3 HUFA status [53]. The purpose of this study was to investigate whether supplementation with omega-3 HUFAs from a krill oil concentrate (PL), with its possible advantages in bioavailability and high amount of PC, will improve emotional status and related cognitive performance under stress among IBOLC students (Phase I) and subsequent RC (Phase II). More broadly, approximately 35% of military spouses report stress related psychiatric illnesses [54]. A potential impact of this study would be information that would support the role for krill oil concentrate containing omega-3 HUFAs in contributing to improving mood, emotional status and cognitive performance among the US population in general [55].
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6503132/
Here’s a couple more links on the topic. All point to the army’s interest in omega 3’s. Some mention that the modern american diet in the last century has shifted too heavily to omega 6’s https://www.army.mil/article/172714/omega_3_study_aims_to_give_soldiers_a_cognitive_advantage
https://academic.oup.com/milmed/article/179/suppl_11/181/4210233
Ok I found the specific study that I was referencing.
https://www.vitalchoice.com/article/soldiers-and-omega-3s-pentagon-pitched-on-benefits
Soldiers and Omega-3s: Pentagon Pitched on Benefits
Vital Choice hears top researchers present compelling evidence in favor of providing omega-3s to soldiers for mental and physical benefits
11/12/2009
By Randy Hartnell with Craig Weatherby
Last month, we attended a unique conference, convened to present armed forces officers with evidence in favor of adding omega-3s to soldiers’ diets.
This was a very timely conference, given the recent rise in suicide rates among service people serving in war zones, and those who’ve returned from combat areas.
Historically, the suicide rate has been lower in the military than among civilians. In 2008 that pattern was reversed, with the suicide rate in the Army exceeding the age-adjusted rate in the civilian population (20.2 out of 100,000 vs. 19.2) — the highest rate since the Army began keeping records in 1980.
The invitation-only event — titled “Nutritional Armor for the Warfighter: Can Omega-3 Fatty Acids Enhance Stress Resilience, Wellness, and Military Performance?” — was intended for uniformed and civilian Defense Department personnel with responsibility for soldiers’ health and/or influence within the Pentagon.