"The work so admirably performed by our left wing, so far as it obliged the rebels in our front constantly to retreat, by threatening their rear, now becomes the office of the Fifteenth Corps, our right wing, on the right bank of the river. Its two columns are moving one day's march in advance of the main body of the army, marching down the peninsula between the Savannah and Ogeechee rivers. The necessity and value of these flank movements first of the right wing with Kilpatrick's cavalry, then of Davis and Kilpatrick on the left, and now of Howard on our right, is because we cannot run over and demolish any and all the Rebel force in Georgia. They could not for a moment stand before this army upon any ordinary battle-ground, but a very small force of infantry or cavalry at a river could delay a column half a day, and perhaps longer, and as our soldiers have got tired of chickens, sweet potatoes, sorghum, etc., and have been promised oysters on the half shell, oysters roasted, stewed, etc., in short, oysters; they don't care to be delayed." The right, Blair and Logan, found a sparse population and rather meagre supplies. The lessoning do not apply to them, the breadth swept by their columns varied from 40 to 60 miles. That Sherman was marching on Savannah was at last clear to the Rebels; and it was equally clear to them that they would not be able soon to stop him. By December 6th the army was at Ogeechee Church, Logan's Corps still on the west side of the river. Kilpatrick's Cavalry engaged the enemy under Wheeler several times near Waynesborough, with success. General Howard made a bold and brilliant movement between the Little Ogeechee and the Great Ogeechee. He pushed ahead of the rest of the army thirteen miles, to the canal connecting the Ogeechee and Savannah Rivers, bridged the canal, crossed it and took up a strong position beyond. This forced the enemy to abandon their line of works between the rivers and fall back to the fortifications of Savannah. Sherman now moved forward more cautiously. The country was swampy and the roads narrow causeways, and the enemy had great advantages in defending the city. There was a Union fleet off the coast, and Sherman sought to open communications with it. By December 12th his investment of the city was complete, and only Fort McAllister barred his way to the shore. General Howard had sent three scouts down the river in a canoe past the fort and they had almost reached Admiral Dahlgren, commander of the fleet; but did not venture to return. Next day Howard, having consulted with Sherman, directed General Hazen's Division to cross the Ogeechee by King's Bridge and move down toward the fort. Then he went with Sherman to a signal station which he had established on the roof of Cheves's rice-mill, and watched the operations.