So I'm writing a historical fiction that takes place during world war 2. It follows the younger of two brothers throughout the war during his search for his older brother that was shot down over Europe. The younger enlists several months after his older brother, just after pearl harbor. He gets sent to the Pacific where he is wounded, then he volunteers for the rangers after he learns of his brother being a pow. My question is, should I add a love interest in the younger brothers life? I have added a way to do so if I choose to, but not sure how to follow. He has just finished his ranger training and is home on leave before being sent to England.