Europe was a massive battleground. The Posleen did poorly in extreme cold, not from the cold so much as an inability to forage, so both the Scandinavian peninsula and the Russian interior had been ignored. But Posleen forces had taken all of France and Germany except portions of Bavaria and swept around in an unstoppable tide to take all the North German plain to the edge of the Urals. There they had stopped more from distaste for the conditions than any military resistance.
At this point there was resistance throughout the Alps and down through the Balkans and Eastern Europe but the beleaguered survivors remained low on food, manufacturing resources and hope. The rest of Europe, all of the lowlands and the bulk of the historically “central” zones, were in Posleen hands.
America, through a combination of luck, terrain and strategic ruthlessness had managed to survive.
On both coasts there were plains which, except for specific cities, had been ceded to the Posleen. But the north-south mountain ranges on both sides of the continent, along with the Mississippi, had permitted the country to reconsolidate and even locally counterattack.
In the West the vast bulk of the Rockies protected the interior, preventing a link-up between the Posleen trapped in the narrow strip of land between the mountains and the sea. That narrow strip of land, however, had once contained a sizable percentage of the population of the U.S. and the effect of the dislocation and civilian loss there was tremendous. In the end most of the residents of California, Washington and Oregon made it to safe havens in the Rockies. Most of them found themselves in the still-building underground cities, the “Sub-Urbs” recommended by the Galactics. There they sat, working in underground factories to produce the materials the war needed and sending forth their hale to defend the lines.