Nation for the railway gun: Germany , Great Britain, Russia, Italia.
Every nation mentioned have a production of only one gun by turn, France start the war with only one railway gun and dont have the possibility to construct other, Alsace-Lorraine sector.
Great Britain start the war with 1 railway gun at London sector.
Germany start the war with 3 railway gun. Two at Saar sector, one at Rheinland.
Italia start the war with one railway gun at Milano sector.
Russia start the war with one railway gun at Leningrad sector.
One railway gun = 6 railway gun. Attack 8 and defence 4, no 8 in defence.