The Scotsman has revealed that he came up with the idea when he received a letter from a serving soldier wishing him a swift recovery from an injury he suffered while playing for Rangers.
"I wanted to do something to recognise the courage shown by our armed forces on a daily basis," Naismith told the Daily Record. "It all started when I received a letter sent to Murray Park during my time at Rangers.
"I was two months into my rehabilitation after receiving a serious knee injury against Aberdeen at Pittodrie. A young soldier had taken the trouble to write to me wishing me all the best and a speedy recovery."
The initiative, which is off the ground thanks to donations from Naismith's own pocket, aims to help soldiers looking to return to employment.