What kind of armor does he have? because my vet 3 officer died at 60% health to a crit from the flamethrower, it was ridiculous. he caught on fire at 60% health, then ran around for like 7 seconds to die since his health was up so high when it crit. can't say I've ever seen a unit die with such high health to a flame.
He has infantry armor for target table and heroic armor for crit table.
Flamers has a chance to crit all infantry below 40% hp, this happens to all officers and is not unique to the American one.