This is why the actual training they need right now at this moment is to stop using the trenches. As soon as drones enter the picture, trench warfare is a losing battle. Both sides are still doing it and there are thousands of FPV videos of the drones dropping explosives on the soldiers that think they are hiding. They need to split up. They need real signal intelligence. They need to capture the drones and get the encryption keys off of them ASAP.

If people insist on using trenches, they will need to change the methodology to the tunnels used in the Vietnam war vs open trenches.