1.Stuff
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1.The Russian AT gun has six soldiers so stays alive longer. A t-34 can easily 2 shot a pak, while a panzer 4 is far more expensive and has to 4-7 shot a zis at gun. A supported pak can die before its support is able to help. A supported zis has time for its support. Hell, it can just run back to base even if it is unsupported.
2.Two t-34s cost as much as a panther, but are available way earlier than a panther or even a stug can come out. There is much less tech to a t34 than to a panther. The problem is that it comes out so early that a german player is either ready to fight infantry and gets destroyed by a t34, or he is ready to fight tanks and loses map control to infantry. A soviet can focus only on anti infantry, germans cannot.
3. MG42/G42 cost 60 munitions for germans, who without buying those are already munitions starved. PPSH cost 20 munitions, hit the dirt is free. Conscripts are very cheap, since you do not need a base building, and they have six soldiers instead of 4. Early on it is fair, but they are more survivable later, as well as more versatile. A soviet with 4 conscripts is a good player, a german with 4 grenadiers is about to get owned.
4. An mg 42 is very flankable, but it is nearly impossible to flank a maxim. They turn and resetup so fast that the other player has to be thoroughly distracted to not stop the flank in its tracks, but even if he is they are next to impossible to decrew. Six man squads mean that grenades kill 1-2, and without grenades you still might lose. All the soviet needs to do is bring one conscript with the mg, and it is completely unflankable.
5. Yah, fix mines
EDIT:grammar, better phrasing