USSR has, off the top of my head:
* Operation Zet, 1937 if Japan invades China: - a bunch of supplies, move toward Interventionism; not sure what Option B is.
* Great Officer Purge, ~1937 or 38: +10 dissent, bunch of dead random officers; or +30 dissent and moves towards Dove Lobby and maybe Central Planning
* Chasan Lake and Nomohan Incident, '38: - a few supplies, + to hawk and interventionism, - to relations with Japan, second event gives Non-Aggression Pact with Japan.
* We Don't Need Bluecher Anymore, 37 or 38: Bluecher dies
* Molotov-Ribbentrop Pact, 39: if historical, cores on Baltic states and eastern Poland. Probably some more slider moves toward interventionism.
I know I'm missing a few events that change your security minister, but since I apparently lost Yagoda in the purge, I never got them.
You can get to full hawk by 1938 or 1939. It beneficial to move to Hawk first, since you get decreases in production cost & time, unless you plan to declare war early on neutrals (Sinkiang, Persia, whatever).