Analysis Reports of heavy rocket artillery firing on the eastern parts of the city of Mariupol, Ukraine, as well as a statement made by a separatist leader, indicate the potential preparation of an offensive on the city. While this would be a significant escalation and an indicator of Russian intent to push further into Ukraine, potentially forming a much-rumored land connection to the northern border of Crimea, there are also several indicators required for such an offensive that are currently still missing. Reports of heavy rocket artillery firing on the eastern parts of the city of Mariupol have been widely reported, with the death toll rising to 27 people. Mariupol has been shelled in the past, notably in early September, but as the cease-fire took affect separatist forces generally conducted attacks only outside of the city. It is not clear whether this is simply an intensification of relatively static fighting along the front between Russian and pro-Russian forces on the one...