I often find that much of the Russian fighting power becomes stacked in Belorussia. Btt by building eight tanks each turn, I can easily use the combined forces to crush the Belorussian army, and after that the door to Moscow is blown wide open.
AS TO THE ORIGINAL QUESTION, YES YOU MISSED A RULE. GERMANY CANNOT BUT 56 IPC’S WORTH OF ANYTHING IN THE FIRST ROUND (YOUR 4 TRANSPORTS & 2 DETSTROYERS.