The Empire by George Mavro
What if 15 soldiers with todays technology and equipment traveled back in time to 1453 Constantinoplis in just prior to the siege. We know they can but will they agree to significantly influence the events and outcome?

While escorting a supply convoy to an off base communications site north of Bagram Airbase Afghanistan, Master Sergeant George Mavrakis and his team are ambushed by the Taliban. Running for their lives with the few survivors of the ambush they manage to flee to an underground mine, but are trapped inside...