Read it through once

Presently the calm head of a forward-going column of infantry appeared in the road. It came swiftly on. Avoiding the obstructions gave it the sinuous movement of a serpent. The men at the head butted mules with their musket stocks. They prodded teamsters indifferent to all howls. The men forced their way through parts of the dense mass by strength. The blunt head of the column pushed. The raving teamsters swore many strange oaths.