In World War I and World War II, at least there were factors like terrain, weather, and logistical supplies that had an impact.
Urban warfare and field battles are also entirely different.
Even seemingly simple and pure aerial battles present diversified scenarios due to radar scanning surfaces, missile performance differences, cannon usage skills, maneuvering skills, differences in pilots' resistance to acceleration, and more detailed techniques such as low-altitude flying to evade radar lock by utilizing ground undulations, and changing flight posture to alter radar reflection areas. These lead to a multitude of complex tactical thinking that doesn't even need to be mentioned.
The generals of that era could always rely on commanding a few troops to maneuver with enemies several times or even ten times their size, employing terrain to the utmost, exploiting the enemy's cowardice and self-preservation mentality, and maximizing the support and assistance from the masses.
