The US think tank, Institute for the Study of War, says Russian forces conducted a large-scale missile campaign on Friday to strike critical Ukrainian energy infrastructure and carried out one of the largest missile attacks on Kyiv to date.Britain's defense ministry says "the waves of strikes have largely consisted of air and maritime launched cruise missiles, but have almost certainly also included Iranian-provided uncrewed aerial vehicles being launched from Russia's Krasnodar region."In an interview with the British newspaper, The Guardian, Ukraine's defense minister Oleksii Reznikov said a new offensive by Russia could happen by February.Ukraine's armed forces commander-in-chief, Valerii Zaluzhnyi, told another British media outlet that the Russians are preparing some 200,000 fresh troops.He added that he has no doubt "they will have another go at Kyiv.""