A tv show called "War Games". Hundreds of people are grown in test tubes with accelerated aging so they reach the age of eighteenish in months instead of years. During these months they're trained in war by ex elite soldiers: Russian Spetznaz, American Green Berets, Iranian Quds Force, you name it. Trained in military tactics including firearms, hand to hand combat, basic first aid, and when they're ready they're deployed into a giant warzone with certain objectives. Capture this location, take out these forces, defend this area, etc. In civilized places outside the warzones "War Games" is the number one show on air, fortunes are won and lost in betting on the different armies. Characters could be the soldiers themselves. I don't know how it'd work out exactly. If you like the idea or have any suggestions, reply.