Answer:
He recalls a war, a battlefield, with soldiers maimed and dying for Jonas. Jonas is a young guy in the memory who offers another severely injured soldier water and then remains with him until he dies. Jonas is hurting, and the pain he's in is unbearable.
If you ask me it starts the story going. it's like the main detail but I would have to see the whole story so it may not be right.
The purpose of the dictionary is all of the above EXCEPT to eliminate dialect and slang.