Final answer:
The summary of the text should include the French participation in the war, the end of the war, and the capture of the two friends' fishing poles by Prussian soldiers.
Step-by-step explanation:
The three sentences that should be included in the summary of the text are:
- The French participation in the war on the side of the Americans.
- The end of the war.
- The two friends lose their fishing poles when captured by Prussian soldiers.