In 1915, at the height of World War I, Albert Marr swore allegiance to Britain. Going to the front, Marr asked for only one thing - to take Jackie's home baboon with him.
At the front, soldiers have no time for entertainment, and no one would have cared about an ordinary monkey, if not for the amazing demeanor and exceptional character of Jackie, thanks to which he turned from an ordinary baboon into the mascot of the 3rd South African Infantry Regiment. He was even given special uniforms and a headdress with the distinctive insignia of an infantry regiment. Jackie was a real infantryman and instead of sitting in a dugout, he participated in battles, crawling through trenches. Baboon learned to salute senior officers, use a fork and knife as intended, and light tobacco in a pipe for fellow soldiers.
Later, the inseparable couple were sent to smash the Turks and the Germans, where Jackie's natural abilities were very useful, for example, he could detect the enemy at a much greater distance than human vision allowed, which more than once saved the soldiers from unexpected attacks of the enemy.
In 1916, at the Battle of Agagia, Albert was wounded and Jackie began to lick his wound until doctors arrived. And in 1918, at the Battle of Paschendale, Jackie himself was wounded. The squad came under heavy fire and through the smoke hanging from the deafening volleys of cannons, Jackie could be seen trying to build a primitive defensive structure out of rubble and stones. Shrapnel injured his right leg, which had to be amputated. Dr. Woodsend, who performed the operation, made the following entry in his diary:
“We thought to give the patient chloroform: if he died, it would be better if it was death under anesthesia. Never before in my practice have I had to give an anesthetic to such a patient. But Jackie snatched out a bottle of anesthetic and began to drink greedily, as if it were a bottle of whiskey! It was enough to do the amputation and put everything in order. "
At the end of the First World War, Corporal Jackie - holder of the Praetorian Medal, holder of a gold stripe for injury, three blue chevrons - for each year of military service and military pension, took part in the London Victory Parade, sitting astride a gun carriage.