What Joan did was not ignored. Military personnel saw where the plane landed and went to the house. They wanted to give whoever was in that plane an offer.
Joan's dad came up with an idea for Joan to dress like a guy so she can go to the military like she always wanted to.
Joan's plan worked. Everyone thinks she's a guy. Her undercover name is Jim. She is immediately put into action. She goes on extreme missions and gets the job done. The military has never had anyone this good before.
Then Joan (Jim) meet Michael. He was also one of the military's best. They talked all night and got real close.
The next morning Joan made a mistake. She let Michael find out she's actually a girl. She begged and begged for him not to say anything. She told him everything. What happened at Pearl Habor and everything after that.
Michael and Joan became closer and secretly started falling for each other. They became partners and Michael made up in his mind that he wasn't going to let anything happen to Joan. They went on many missions together and started dominating the Japanese.