Oh, sorry, I wasn't aware Reddit was the place you had to cite your sources for speculation about how folks aren't seemingly aware of how useful a balloon is for surveillance, and under what scenarios they might be critical.

Will leave the basic googling to you. Look into how cheap and useful balloons are, and why you might want to use them to understand and prepare for a conflict your military has been tasked with getting ready for, regardless of whether or not you intend to really fight a war.