[Mohoender]

What I'm going to write does work if the Soviets effectively land in Alaska with their small offensive spearheaded by arctic brigades.

First thing, recall that the entire Kamchatka Peninsula was, then, military ground and absolutely forbidden to all but soldiers. Then, USSR had a special body set up in 1932 only to run traffic through the artic. Since the soviet era, military installations and harbors up there had been dismantled and left to rot but they were substantial up to the early 1990's. If one place still holds some supplies it is it.

Oil might have been a problem but I would expect the Soviets to have planned a move similar to the one imagined by Von Rundstedt in the Ardennes fifty years before. Soviet units would be running low on gas with their first goal being to run for US oil supplies. Elmensdorf ASB had been targetted but that leaves the North Pole and Prudhoe Bay refineries intact with probable reserves. May be even growing ones since the pipeline might have been cut

Second, the best time for the Soviets to attack could be when the Ice is still there but getting thinner or slowly comming back. Strangelly I would expect early fall more than summer. The logical landing site for USSR could be Barrow and Prudhoe Bay (with its refinery), travelling through the Northern Seaway (a sea route they are about the only one to know by heart, they used extensively for decades and practiced for centuries) and invading Alaska from the arctic seaports of Pevek with a supply line going through Dikson and Tiksi. Then, and only then, would they push South toward Anchorage. However, when they arrive there, I doubt the northern refineries to be still intact.

USSR had 9 (may be 10) working nulcear icebreakers, as many conventional heavy duty ones and several dozens of smaller patrol icebreakers belonging to KGB under its border services. Most carried some types of weaponries or were design to carry them and all were powerfull enough to open the way for the remaining landing ships and cargo. Moreover, there is no reason to have all these ships destroyed as they should have been moved out of the main harbors to the major Soviet arctic seaports. Moreover, The NATO fleet has been shaterred around Murmansk and the Arctic remain Soviet almost exclusive territory.

Meanwhile, US and Canadian navies couldn't match (and I think they still can't do) the Soviet Arctic Fleet. Morevoer, with surviving US ships occupied further South, the way is quite cleared. In addition, the Soviets would use LCAC and probably a few Orlyonoks plus aircrafts to drop spearheading forces. Of course, I have not doubt that what is left of US-Canadian command has thought that it could happen but they can have underestimated the immediate threat and with the chaos following the exchange they might have lacked the ressources to answer immediately. However, when the Soviets reach Juneau they have gathered what was needed to stop Soviet progression. Again, outside of the few arctic and naval brigades, their troops are all composed of second and third line units.

At last, as soon as full summer comes with the sealane easily reached, I doubt that Soviet ships can maintain a regular flow of supplies or troops. When everything achieves to crumble, some icebreakers might still be there, most arctic seaports might still be functional but the Kremlin has ceased to have the material means and the authority to keep them running.