Whispering Death

Yeah, tactics have evolved a lot in every stage of the game.

If you want just infantry tactics then the basic concept of find-fix-flank-finish from WW2 is still the basic tactic used by modern infantry. Nothing works better than keeping a guy stuck then hitting him from the site. But the flexibility and firepower has increased hugely. Now when it comes to tactics you have fireteams where every man knows exactly what he should be doing at all times. This is training far above the kind of loose squad based ideas in WW2, instead you see highly skilled highly professional tactics where every situation has a plan and every man knows how he should react in the team. Then you move into MOUT tactics which has blown wide open since the early days of WW2. You have all manner of tactics on how to room clear, how to handle stairs, how to search houses, corners, sewers, roofs, etc. etc. that just wasn't around in WW2.

Now if you want to move on to broader concepts of tactics you can look at the tactics used in Afghanistan. The most effective tactic was a guy with binoculars, a map, a GPS, and a radio sitting on top of a mountain. Just sight the enemy and guide the aircraft in to decimate them with high explosives from 10,000 feet above. In WW2 airplanes just straffed whatever they could find.