Didja update your Wills and Insurance during the POM?
Seriously:
Environment is key. In open terrain like a desert, foot infantry just can’t keep up with a mechanized force; almost all of our infantry support was Mechanized (in M-2 and M-3 Bradleys) or Airmobile (Air Cav and such), and there biggest duty was gathering up EPW after the battles or clearing hold-outs out of bunkers.
The “cavalier” attitude of pilots (fixed and rotary winged) is one of the reasons they aren’t to well regarded by any ground force. This is what ground troops generally believe goes on in aircraft during a battle:
Pilot 1: “I say, Pilot 2 old boy, is yon tank one of ours, or one of theirs?”
Pilot 2: “Well, old bean, I can’t quite say for certain. Did you check the map? Are our lads about this area?”
Pilot 1: Well, old hat, my eyes can’t quite focus. That party last night at the O-Club was a bit of a romp."
Pilot 2: “I’ll say, old chum. Well, since it’s close to Happy Hour at the O-Club, just fire off the last of your ordnance and be done with it.”
Pilot 1: Roger that, old spice. Tally Ho and all that. Last one back buys the first round!"
In more enclosed terrain (especially urban environments) it becomes a bit more problematic. The tank’s armor isn’t uniformally thick all about, with the thinnest being the rear and the top. So, conceivably, leg infantry (as opposed to mechanized or airborne) could hide, let a tank go by, and pop out with a man portable anti tank weapon for a clean shot at the rear.
As has been already noted, tanks rarely work alone; two- and four-tank elements (sections and platoons) are quite common. In Desert Shield/Storm, our smallest operational unit was a battalion. That’s a lot of firepower, working in close conjunction. Movement in hostile terrain was most often “Bounding Overwatch”, a maneuver where one unit sets up for covering fire, and another moves forward a bit. They then trade functions. In this manner, someone is always watching out for the other. Very similar to advancing infantry, but for longer distances.
Modern tanks (like the LeClerc, the Leopard, the Challenger, the Abrams and the T-80) have gyroscopically stabilized turrets, which allow for firing “on the move” with little if any degradation in accuracy. As well, sophisticated fire control systems (with laser range finders, IR and Thermal optics and Fire Control Computers) allow for amazing accuracy (gunners are, more often than not, the limiting factor) in all kinds of inclement weather and conditions.
Taken all together (sophisticated weaponry, trained crews, co-ordinated tactics), modern Armor is pretty fierce. But by no means is it undefeatable.
Lone infantrymen “climbing aboard with satchel charges” is pretty low down on the threat register, though.
robby, Danimal:
It’s possible at the battalion and brigade level to have “pure” units (armor, infantry), but at the division level there will some combination. Armor divisions will probably have a brigade of infantry; Infantry divisions will probably have a brigade of armor.
During war, the units may get “chopped” and assembled as task force(s) to support one another, depending upon the mission. The same way fighter jets from one squadron may get tasked to support and escort bombers from another squadron.