The column moving detached from the army still in the trenches was, excluding the cavalry, very small.

The forces in the trenches were themselves extending to the left flank.

Warren was on the extreme left when the extension began, but Humphreys was marched around later and thrown into line between him and Five Forks.
My hope was that Sheridan would be able to carry Five Forks, get on the enemy's right flank and rear, and force them to weaken their centre to protect their right so that an assault in the centre might be successfully made.

General Wright's corps had been designated to make this assault, which I intended to order as soon as information reached me of Sheridan's success.

He was to move under cover as close to the enemy as he could get.
It is natural to suppose that Lee would understand my design to be to get up to the South Side and ultimately to the Danville Railroad, as soon as he had heard of the movement commenced on the 29th.