(so far as I can recall) who never forgot the importance of the basics of the trade (Soldiering is a trade, not a profession...), his roots or what was really important -- as opposed to the many who spend much time on the seemingly important. Infanteer is right, IMO. Everyone who serves should at least read it. Owning a copy of "Defeat into Victory" is better, it merits re-reading from time to time...

Back to the thread. As he also wrote, you need specially trained folks for very long range strategic reconnaissance -- for everything else, a suitably trained and equipped Infantry Battalion can do the job. I would emphasize trained, equipage is important but good units can make do...

In more years than I care to recall, I've seen many varieties of infantry units from over a dozen nations in combat. Most of the 'specialized' units were not really successful.