British Intelligence Ukraine war map as of Apr. 12

Over recent weeks, Russia has continued to develop extensive linear defences in Zaporizhzhia Oblast in southern Ukraine. The area is highly likely the responsibility of Russia’s Southern Grouping of Forces (SGF).

Russia has now completed three layers of defensive zones across approximately 120km of this sector.

These consist of a front line of forward combat positions, and then two zones of nearly continuous, more elaborate defences. Each zone is approximately 10-20km behind the one in front.

Russia has probably put significant effort into these defensive works because it is convinced Ukraine is considering an assault towards the city of Melitopol.

The defences have the potential to be formidable obstacles, but their utility almost entirely depends on them being supported by sufficient artillery and personnel. It remains unclear if the SGF can currently muster these resources.