Although they did initially get “wiped out”, but (from the article):

by repeating the training scenario throughout the two-week exercise, US Army troops got better at figuring out how to disperse and hide from the drones while using countermeasures such as electronic warfare.

Which is the point of these exercises. It’ll still take time to modify doctrine and train, but the US is now more practically informed on this type of warfare.

Do you have a source? I tried to find one and only came across the Rosenhan Experiment, which states the longest stay was 52 days, and it was an experiment about diagnoses, not sanity provability.