From Slave to Soldier: Based on a True Civil War Story (Ready-to-Read Level 3)

Johnny loves his Uncle Silas and his master's mule, Nell, but he hates being a slave. So when a group of soldiers marches by the farm and asks Johnny if he wants to join the Union Army, Johnny accepts, even though it means leaving Uncle Silas and Nell.
Being a soldier isn't easy. Johnny is given a chance to work with a soldier named Dave and the company's mule team, but he still wonders if he has made the right choice.
Then one night a hungry patrol is out on watch across the river from t...