John McDermott's relationship with The War Amps started in the mid-90s when he began developing a large fan base. Instead of charging a membership fee to join his Fan Club, John asked his new fans to make a donation to one of his designated charities. John chose The War Amps as it was one of his father's favourite charities and because of his love for veterans.

Whenever possible, John invites members of The War Amps to his concerts and special events and mentions the work that the Association does for veteran, civilian and child amputees across Canada.

In 1997, John was a special guest at The War Amps Biennial Seminar held in Toronto. John was named an Honorary Member of The War Amps, in recognition of the tremendous work he has done and continues to do in developing awareness both in Canada and abroad. During his visit to the Biennial Seminar, John made sure to visit each and every member in attendance regardless of his tight schedule. To conclude his visit, John sang two songs for the members – Mother Machree and Danny Boy.

Much of John's music reflects the horror and futility of war and the personal tragedies that the soldiers and their families suffered because of it. Also in 1997, The War Amps produced a 60-minute music video which paired the heart-wrenching lyrics of John's music with the archival footage of The War Amps. John McDermott: The Tragedy of War has received numerous awards internationally and is available through The War Amps.