>>64166453
That's interesting.

Since WWI (although I guess you can see this in development during the U.S. Civil War), the density of infantry in a "line" has been steadily decreasing. A defensive position can now be held with fewer soldiers because they have long-range direct fire weapons and can call in indirect fire support, and it's best to try and hold it with only a few soldiers because enemy artillery can wreak havoc. This also makes "infiltration" tactics (as the Russians have been using) so important. So to counter that, you need to be able to mass reinforcements fast enough to seal the breach before it does real damage, and also drones can help monitor infiltrations through "dead ground" and blunt them, hopefully reducing the need for infantry. And then the infantry have direct-fire weapons with double/triple the effective range.