Western doctrine is also largely based on the US’ needs. Artillery just isn’t practical for the US, who needs to be prepared to fight all over the world oceans away from home. Artillery is much more stationary compared to air power due to the size of the guns and the difficulty moving them, while the US can easily fly planes anywhere we need them. As such, Western doctrine became heavily reliant on having air supremacy and massive amounts of air support and our equipment was designed for that battlefield. Ukraine just doesn’t have nearly the same arial capabilities as NATO, relying much more on artillery which NATO weapons and doctrine weren’t designed around, and they’re having to figure out how to make them work without air power
Without any crime to suspect you of, they might detain you and question you. It’s not uncommon for people to turn themselves in for crimes, and there are legitimate reasons to do so especially with a lawyer, namely to get out on bail easier, avoid having the police raid your home or place of work, and perhaps used to sway the prosecution for a more favorable sentencing, but if the police have no clue what to even charge you for and they can’t figure one out, they’ll just be confused and frustrated, which is a dangerous combination for police