Complex sentence: The 27th Kentucky Infantry was organized at Rochester, Kentucky and mustered in for a three year enlistment on March 21,1862 under the command of Colonel Charles D. Pennebaker.
Split into simpler sentences: The 27th Kentucky Infantry was organized at Rochester, Kentucky and mustered in for a three year enlistment on March 21,1862. It was mustered in under the command of Colonel Charles D. Pennebaker.