Definitely. The movie draws inspiration from real events and the accounts of those who were involved, offering a portrayal that aims to be true to history.
Physical training made them strong enough to endure the hardships. They could carry heavy equipment, march long distances, and still be combat - ready. In the story, this physical fitness might have been the difference between life and death in some situations.
The story also includes the leadership aspect. The officers led their men bravely. They had to make tough decisions under extreme pressure. For example, deciding on the best defensive positions. This was crucial as it affected the survival of the soldiers.
Lieutenant Colonel Hal Moore was a main character. He was in charge and led his troops into battle. His leadership was crucial in the events that unfolded.