What is the main conflict in Faith of My Fathers by John McCain?

"Faith of My Fathers" by John McCain with Mark Salter is a memoir that highlights John McCain's ancestry, focusing primarily on his grandfather, father, and on his own life. Not glamorizing their existence, this book is a real account of the triumphs and pitfalls of the military men. It carries the reader through wartime strategies from the First World War through the Vietnam war.