Final answer:
When Chamberlain sees that the Union forces are losing in the peach orchard, he tells his six prisoners to join the fighting. The prisoners choose to join the fighting and help turn the tide in favor of the Union forces.
Step-by-step explanation:
When Chamberlain sees that the Union forces are losing in the peach orchard, he tells his six prisoners to join the fighting. He informs them that they have a choice: either fight with the Union or stay as prisoners but risk getting hit by artillery fire. He offers them the chance to be treated as prisoners of war if they fight. The result is that the prisoners choose to join the fighting and help turn the tide in favor of the Union forces.