West Central Alberta Coldest, wettest edge | As donkey show farms said above, the demographics are so horrible in Eastern Europe and Ukraine specifically, then add in the massive out migration during the war, and they won't need you to rebuild very much. Mostly just the infrastructure for commodities.
With the exception of a few larger cities, most every other area was already likely had a surplus of residences and associated infrastructure.
Nearly everything there is built with bricks and concrete, none of that needs to be imported, the same with steel. |