US Armored or Mechanized  Projected Movement, April 1979 (Against light or scattered Resitance)
3.3 KM an Hour in Open Terriain
1.5km/hr Mixed Terrain
.5 Km/hr in Dense Terrain

A US Infantry Battalion Would  have a frontage of 3 kilometers of the line.
A Soviet Armoured Regiment a Frontage of 5 to 8 Kilometers
US infantry in Vietnam on Foot: 10 kms in a day in the Jungles
In the opening of the Korean War the North Korean infantry moved at a speed of 13.9km a day
Rommels Greatest Drive was 158.7 Km in 24 hours
Averaged around 22KMs a day

More to come including the VietCong!