Locking Zones of Control: Do you use them?

[goomohn]

JDR Dragoon:

Most WW2 battalions would expected to be able to man a 3 kilometer frontage fully and be able to hold it against all comers, holding at least a company or two in positions in depth behind the frontline companies (depending on whether the battalion has 3 or 4 rifle companies). And with that depth and reserve comes the ability to dominate terrain to the sides and rear by the shifting of fires and/or men to alternate targets and positions. This is how you dominate a position of 9 sq. km.

Handbook On German Military Forces [http://www.ibiblio.org/hyperwar/Germany/HB/HB-4.html]:

The width and depth of a German defense area depend upon the terrain and the proportional strength of friendly and hostile forces. In general, however, the width of a defensive sector assigned to a unit is approximately twice the width of the sector when the same unit attacks. Normal sectors are: platoon, 220 to 550 yards; company, 440 to 1,100 yards; battalion, 880 to 2,200 yards; regiment, 2,200 to 3,300 yards; division, 6,600 to 11,000 yards.

I'm not gonna entertain an argument that a WW2 battalion could actually dominate a position of 9 sq km. Say if it was surrounded on all sides by enemy units which are in turn surrounded on all sides by units friendly to the isolated battalion. It's threat of fire is so great no enemy unit may march into its ZOC to snuff the lone battalion out?