3 or 4 It's not official yet, an SMO is the type of operation that Putin is pursuing at the moment he calls it a Special Military Operation, not all out war, De-Nazify Ukraine was aimed at specific targets not the infrastructure or civilians. Speculation is that Putin is expecting a big attack so he is readying the full force of the Military to allow them to make an appropriate Military response.

Edit: Kherson region is also asking to become Russian, making the 4th to join.

3 or 4 It's not official yet, an SMO is the type of operation that Putin is pursuing at the moment he calls it a Special Military Operation, not all out war, De-Nazify Ukraine was aimed at specific targets not the infrastructure or civilians. Speculation is that Putin is expecting a big attack so he is readying the full force of the Military to allow them to make an appropriate Military response.