Why was General George McClellan an ineffective Union army commander?

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A. He was too cautious and delayed leading his troops into battle.
B. He was cruel to his soldiers.
C. He wasn't interested in being a leader.
D. He rushed into battle without concern for his soldiers.

A. He was too cautious and delayed leading his troops into battle.

The most commonly cited reason for General George McClellan's effectiveness as a Union army commander is A. He was too cautious and delayed leading his troops into battle. McClellan was known for his cautious nature and reluctance to engage the enemy, often spending a significant amount of time preparing and planning before taking action. This resulted in missed opportunities and allowed the Confederates to regroup and reinforce their positions.