Unsung Hero of GettysburgGen. David McMurtrie Gregg (18331917) was one of the ablest and most successful commanders of cavalry in any Civil War army. Pennsylvania born, West Pointeducated, and deeply experienced in cavalry operations prior to the conflict, his career personified that of the typical cavalry officer in the mid nineteenth century American army. Gregg achieved distinction on many battlefields, including those during the Peninsula, Chancellorsville, Gettysburg,