Rebel fighters took him and other children from his home village in 1991 after a bloody fight, leaving families like his broken apart. It was part of the Bor massacre, which left an estimated 2,000 people dead during the Second Sudanese Civil War.
He remembers the day he ran for his life and the moment he was separated from his mom and dad who was herding cattle.
“We just ran out and everyone was crying and yelling.”
Mach said rebels came to defend his village after learning it had been under attack when the government decided to collude with rebel defector to destroy a rebel leader at the time. After the fighting was done, rebel troops scooped up Mach and other kids.