The Institute for the Study of War (ISW) has said Russia may be preparing a new offensive in Ukraine in the coming weeks. The US-based think tank’s announcement comes amid concerns that newly approved arms supplies from Washington will not reach Kyiv in time. Delays in Western assistance have already helped Russia make incremental gains along the frontline. “Ukrainian forces currently are under immense constraints due to material shortages and delays in Western security assistance,” explained ISW Russia analyst Riley Baily. “Ukrainian forces do not have the capabilities that they previously ha…