US soldiers are experimenting with a growing number of new technologies, particularly drones, but Army leaders say that there is a limit to how much troops can take on at once and still keep their focus on training for war.

The Army is pushing to deploy thousands of drones across its formations over the coming years, but officials caution that giving soldiers new systems too late in the training cycle distracts them. A 180-day requirement is designed to give them time to master the tech before trying it in warfighting exercises.

“We’ve established a temporal threshold 180 days out where we have to give them that equipment then, so that they…