Krasnoyarsk Pact fortifications in Europe

The construction have begun when the Second Civil War just ended. It continued for 10 years and finished in November 1941. The strongest of them (although in some places there was still a breakthrough): the Minsk Line was built along the Old Border; the weakest - the Brest Line, but fortunately it held Euroreich forces for a whole month. Turkey, compared to USSR, had more time to prepare and all it's forts was strong and ready.