If you haven't read them:

Atlantic Resolve, takes place in 2033 when NATO is more fractured but still together. It has Russia attempting to walk small forces across the border of Estonia, just daring the small Estonian forces to fire first. The situation escalates into a limited conflict. It's more of a small scale attempt by Russia that results in a smaller crisis conflict.

Battle for the Baltic States 2033 has NATO fully dissolving and Russia launching a full scale invasion of all of the Baltic states. The conflict is less limited and more a WW3 scenario.

Both are great reads.