Soldiers need to train in offensive and defensive operations. The counter-insurgency operations we did in the past were very different. The threats they were exposed to, although regrettably so lethal, were different in nature. When you're now out in an environment where you're concerned about the presence of a near peer, you're not only looking on the side of the road for an IED and the presence, perhaps, of a suicide bomber, but you're also looking for other weapon systems to be there that could have a negative effect.
The one scenario you saw that included the school bus, as an example, also had the presence of other military forces in the area. So when they reacted to that, they reacted in a way that told them there were other people there with weapon systems that could hurt them from a distance. It imposed another level of tactical problem solving that the commander had to go through in his estimate. Recognizing that it was very early on in his training, that's a very good thing to push him through because they're able to work that through in their head.
The issues of time and space are very different when you're going into near-peer situations. An enemy has a stand-off capability and you need to be thinking beyond only the immediate environment, but about what is out there behind the next hill. And that's the piece they're trying to work through.