The 'Green Zone' based on a true story usually involves the complex political and military situation. It may be about how soldiers and diplomats operate within a relatively safe area (the Green Zone) while surrounded by turmoil outside. It can also show the struggle for power, the search for truth, and the challenges of post - conflict reconstruction.
Well, the 'Green Zone' based on a true story could be about many things. It might be centered around the experiences of the military personnel who are stationed there. They have to deal with things like insurgency threats, trying to build relationships with the local population, and also coping with the internal politics of their own military and diplomatic teams. There could be stories of heroism, like saving civilians during attacks, or the difficulties in getting accurate intelligence in a volatile environment.