Final answer:
True. Clara Barton, a Union nurse, was known as the "angel of the battlefield." She played a significant role in providing medical care to soldiers during the American Civil War and later founded the American Red Cross.
Step-by-step explanation:
True
Clara Barton, a Union nurse, was indeed known as the "angel of the battlefield." She was a pioneering American nurse who played a significant role in providing medical care to soldiers during the American Civil War. Barton's efforts in tending to wounded soldiers on the frontlines earned her the nickname "the angel of the battlefield." She later went on to establish the American Red Cross.