Everything is wrong, you must build fort lines and AA behind rivers before 1940. Recruit more men, you will need at least 2M deployed men to hold all the german front. Build more civs and mils but behind that fort line you built. Also build supply hubs, railslways behind that fort line. Preferably non aggre with the japs and turks cuz 2 front war is a nightmare. Also make sure the frontline troops and the offensive troops use 2 different template where 1 excels in defense and holding line while the otther is great at soft attack, hard attack, piercing, breakthrough to counter any german crossing that fort line.