How Marines effected the battle of Chapultepec?

Mexico City.

No. Harper's Ferry was a land battle. Marines at that time were exclusively deployed by the Navy.

Croydon was hit by the most V1 doodlebug pilotless flying buzz bombs as they dropped from the sky running out of fuel on their way to targets in London.

under water below 100km deep perhaps

They became known as the Devil Dogs in the Battle of Belleau Wood during Wprld War One.