vaalla

Probably is a camera.

Probably airforce.

There are interviews with Ukrainian soldiers who said they stay away from civilians so that when Russians bombard them the civilians will not be affected.

I think the combat style and priorities are a bit different so a comparision cannot be made in this case.

It’s hard and expensive. The us-mexico border has the same problem and US spends like crazy to find tunnels. If the tunnel is bellow 5-10 meters I think it’s almost imposible [1]

In Gaza from what I heard they also only use hand tools to avoid making a lot of noise.