What evidence from before chapter 15 shows woody's survival of the war

As a young male of age, he is given the choice of internment or signing a loyalty oath to the United States. Although an American citizen by virtue of birth as a second-generation Nisei, he is conflicted because signing the oath also seems by definition a rejection of loyalty to his Japanese ancestry. Ultimately, he signs the oath and is drafted into service. After the war, Woody’s conflicted feelings loyalty are still burning strong enough to urge him to actually visit Japan to connect with that ancestry.