[Suhiir]

Another thing is some modern technology really changes the games (and real life battle) dynamics.

When Anti-Tank Guided Missiles (ATGMs) are introduced in the 1970's they make everything everyone knew about armored warfare obsolete overnight (just ask the Israelis in 1973).

A few years after this Thermal Imaging (TI) turns the night into day and makes fog and smoke largely irrelevant for those that can afford it (ask the Iraqis in 1991).

More recently active countermeasures on armored vehicles have turned the dreaded (to tanks) ATGM into a non-threat ... the first time, or two, one is fired at them.

Learning what certain technologies can do, when they become available, who has them, and how to counter (or at least mitigate) them forces you to adopt entirely different tactics at various points (or vs various opponents) between 1946-2025.