[Treefence]

When it comes to mine clearing for this Ukrainian offensive, are there going to be mine fields all the way down to the sea of Azov, or are those primarily along the first line of contact?  It seems clearing mines is extremely challenging, and relatively cheap and easy to set up for a defender who is holding a fixed position for a long time, but once Ukraine theoretically has a major break through, will they continually have to worry about that?  Is Russia able to continually lay mine fields as they pull back?

[Treefence]

When it comes to mine clearing for this Ukrainian offensive, are there going to be mine fields all the way down to the sea of Azov, or are those primarily along the first line of contact?  It seems clearing mines is extremely challenging, and relatively cheap and easy to set up for a defender who is holding a fixed position for a long time, but once Ukraine theoretically has a major break through, will they continually have to worry about that?  Is Russia able to continually lay mine fields as they pull back?