Cracker by Cynthia Kadohata
An internal conflict would be Rick vs Himself. He has to push himself. He got shrapnel in his leg and has to deal with it and push himself to walk and get better faster. An external conflict would be Rick and Cracker. Rick has to ask anyone and everyone he can to see if they can help him find Cracker. He was rushed to a hospital out of Vietnam and Cracker was left in Vietnam all by himself. Cracker has to fight against the terrain of Veitnam and with herself. She has to push herself to keep going and find anyone like Rick.