It comes after the charity Combat Stress, which provides mental health support for ex-servicemen and women, reported a 26% increase in people using their services for help than the year before.
The Armed Forces Christian Union (AFCU) also says "there's still a long way to go" in terms of the way the Army supports service personal suffering from mental health problems, with many not realising they need help. It added there is also a lack of medical personnel available to treat them when they do seek advice.
AFCU also urged people to pray for servicemen and women suffering from mental health disorders, as well as the medical staff and army chaplains who help them.
The Executive Director, Val Hall, told Premier: "We have had a consistent entry in our prayer diary over the last three years, asking our members to pray for all those suffering from post-traumatic stress and that they'll find the help that they need, and we've just been rejoicing in the office."
"I think there's still a long way to go, but it would be fantastic if your listeners would join us in prayer for the people affected by [military] operations, and for the medical staff and the chaplains as well.
"Members who are psychiatrists and mental health nurses are under a huge amount of strain... under-resourced because of the tidal wave coming towards them."
AFCU says it is able to link active and ex-service personnel to Christians who are able to help them through mental health problems.
Listen to Val Hall speaking to Premier's Aaron James here: