New tactics.
--A letter from a correspondent with Gen. Forrest's command, relates the following incident in the regent pursuit of Grierson:‘ Gen. Forrest has a method of preventing straggling on the battle-field which would rather astonish Hardee a tactics but a very effectual one. He saw a man coming off the battle-field on Saturday, and ordered him to halt and return, when, the fellow not obeying with sufficient alacrity, he had him taken down then and there, and he, the General, dismounted, got him a piece of board, and gave the disconsolate youth a half dozen well laid on, and sent him back to his place.
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