Everyone coming in with a hot take on "lol reports" here should go look up what a military command actually does during a war. Because some advances in live streaming aside...they read reports, and write more reports.

In fact something your field commanders get to do is go and be shot at and then write reports about what happened. Radio operators keep notepads of things to send to back to base while in the field (usually meaning they're the last to sleep because they need to get the reports in).

Writing stuff down is how knowledge is communicated in all disciplines.