 Complete the following phrase:  On January 29, 1863, Grant assumed overall command. Eventually, he attempted to advance his army through water-logged terrain to bypass Vicksburgs guns. The plan of attacking Vicksburg from downriver carried great risk because upon crossing the Mississippi River, his army would be beyond the reach of most of its supply lines. On April 16, Grant ordered Admiral David Dixon Porters gunboats south under fire from the Vicksburg batteries to meet up with troops who had marched south down the west side of the river. Grant ordered diversionary battles, confusing Pemberton and allowing Grants army to move east across the Mississippi, landing troops at Bruinsburg. Grants army 