Her Royal Highness succeeded her spouse as colonel of the regiment last year.
As part of an exercise on Salisbury Plain, the Princess of Wales risked the snow to help a wounded soldier.
Her Royal Highness participated in training with members of the 1st Battalion Irish Guards, simulating a situation. In which they were on foot patrol and came under fire from an enemy.
During the exercise, a soldier sustained a gunfire wound to his lower left leg and was evacuated by his colleagues.
Kate then assisted Lance Corporal Jodie Newell in the exercise. Administering first aid and applying a tourniquet to the casualty’s lower left leg.
The “injured” soldier was then transferred to a stretcher. Kate assisted in evaluating him for additional torso injuries.
Kate, who is Colonel of the Irish Guards, was visiting the troops for the first time since obtaining the honorary appointment last year when she took over from her husband.
She was taken on a tour of the Salisbury Plain training area by Major General Christopher Ghika, commander of the Army in London and the Household Division, and Lieutenant Colonel James Aldridge, commander of the 1st Battalion Irish Guards.
Kate was informed of the recent activities of the battalion, which included meeting guardsmen who had been deployed for security work in Africa and training park rangers for anti-poaching operations.
The royal, who wore a green combat uniform and held the rank of colonel. Also got instruction on counter-explosive ordnance, or de-mining, from the Irish Guards.
She also observed a variety of weapons utilized by the regiment.
Lieutenant Colonel Aldridge said his regiment was delighted to welcome Kate to Salisbury Plain as Royal Colonel.
“It is particularly fitting that a few of our female soldiers encountered such an inspiring female role model on International Women’s Day,” he said.
“It is a true honor for all the guardsmen to meet their Royal Colonel in the field here on Salisbury Plain and demonstrate a few of our basic operational skills.”
Queen Victoria founded the Irish Guards in 1900, and they are experts in infantry combat.
Reconnaissance, engaging enemy forces with machine guns and mortars, and anti-tank operations are among their specialties.