...ity unprepared, and by a dash down the river from Memphis, while General Grant, at Oxford, Miss., with 50,000 men, confronted the Confederate army of only 21,000 effective men at Grenada. He caused General Sherman to organize his army at Memphis and move down the Mississippi river to Vicksburg, leaving Memphis about the 18th of December, 1862. These two large armies were to act in conjunction, Grant moving d...