In order to simulate the ineffectiveness of Soviet defenses before the war with Germany, the Soviet Union has significant defensive penalties for its military that cannot be adjusted in-game by the player. The GDE (Ground Defense Efficiency) score is essentially a percentage of the effectiveness of your units on defense. Thus, a GDE of 0.2 means 20% effective, or put another way, fighting at an 80% penalty when on the defense. The normal value of GDE for other nations is 0.8: due to all the advantages defenders have in the game, GDE never rises above 0.8.
- The Soviet Union starts with 0.2 GDE.
- It increases by 0.1 in May 1940 and later years for a total of +0.4.
- When anyone DOWs you get all these future increases plus an additional 0.1 are received.
- When Finns offer you peace through the event you get +0.1 (note this is the event not any other offer of peace).
- Grand total gets you back to 0.8.
- AI gets +0.6 at the start instead of the above events EXCEPT that they still get the Winter War event allowing the AI to get 0.9 GDE.
Timeline of GDE values:
- Prior to Dec 12th, 1939, your GDE should be 0.2
- From Dec 12th, 1939 to May 1st, 1940, it should be 0.3
- From May 2nd, 1940 to May 1st, 1941, it should be 0.4
- From May 2nd, 1941 to May 1st, 1942, it should be 0.5
- From May 2nd, 1942 to May 1st, 1943, it should be 0.6
- From May 2nd, 1943 to May 1st, 1944, it should be 0.7
- From May 2nd, 1944 on, it should be 0.8
Being attacked by a major power (eg: Germany) will automatically boost your GDE up to 0.7 (after a random delay of a few weeks to as much as several months)... but ONLY if they attack you, not vice versa; and the last boost (from 0.7 to 0.8 GDE) only happens in 1944, regardless. Note that all of this applies ONLY to a Human-controlled Russia... an AI-controlled Russia has a GDE of 0.8 right from January 1936 on.