Fwiw, there have been low-flying military helicopters flying regularly over Los Angeles ever since the pandemic started. By regularly I don't mean constant, but rather 2-12 times/week. Compared to pre-pandemic this was never, so it's an easy-to-see phenomenon for anyone observant of the skies. By low, I mean <1000 feet, as in "who cares what normal city restrictions are" height. Lots at night as well, but harder to observe. I've heard anecdotal reports from others around the country of previously-never-routine military flights as well.

Random times of day, except for a smallish chopper (2-4 people, for individual transport or courier) which seems like a morning and afternoon commuter except that it's military grey.

Fwiw, there have been low-flying military helicopters flying regularly over Los Angeles ever since the pandemic started. By regularly I don't mean constant, but rather 2-12 times/week. Compared to pre-pandemic this was never, so it's an easy-to-see phenomenon for anyone observant of the skies. By low, I mean <1000 feet, as in "who cares what normal city restrictions are" height. Lots at night as well, but harder to observe. I've heard anecdotal reports from others around the country of previously-never-routine military flights as well.