In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
Q: Context: After serving on the Missouri border he resumed his commission in the regular army Feb. 15, 1862, and in March was transferred to the Army of the Potomac. Link Information: After serving on the Missouri border he resumed his commission in the regular army Feb. 15, 1862, and in March was transferred to the Army of the Potomac. Answer: Major General George B. McClellan
A:
Who was in charge of the Army of the Potomac the year Wessells was transferred there?