The Question and Answer section for The Things They Carried is a great resource to ask questions, find answers, and discuss the novel.
From the text:
He would imagine romantic camping trips into the White Mountains in New Hampshire. He would sometimes taste the envelope flaps, knowing her tongue had been there. More than anything, he wanted Martha to love him as he loved her, but...
Strunk steps on a mortar and blows his right led off at the knee. Strunk changes his mind about the pact and begs Jensen not to kill him. Strunk would rather live with a missing leg rather than die.
I'm not sure what you mean by the "context of the disagreement". Can you elaborate? Thanks.