enemy counters ( german infantry and tanks ) all have a defence value required to destroy them and a suppression value above that.. what does this value mean / do ?

How to judge how much suppression fire to use to have a high chance at a successful suppression of the German units?

What is today's update for?

Does clicking a Fog of War card do anything? or just waste one of your card actions?

I have the board game and I have soviet actions to take and the game is not allowing me to attack units on the same colored track. Plus,when picking a wehrmacht card and the unit is placed on a track no ability to use the suppression counter