Thunder in The Wind. Sievers, #2

Lieutenant-Colonel Grant Sievers oversees the mouth of Kettle Creek during the War of 1812. Hundreds of miles from civilization he fights not only the Americans but disease, starvation and hostile Indians. It isn't until after the war when he is injured. The doctor tells him that he will never walk again. Lucas Sievers spies for his country. Known to the Americans as Angus Truitt, he infiltrates enemy camps, learning their secrets and reporting back to General Brooks.
His only goal is to find his son. Sam had been kidnapped and sold into slavery. After the war, Lucas and his good friend Night Wind head south through hostile territory to find Sam and bring him home.