How on earth did you beat Russia?
In the Beginning it was Good generals and good timing. Russia had just finished a war in China so I attacked to get Northern and Southern Finland. I managed to take most of Finland before they could respond.
I also at the time had a larger navy so I could blockade their capital and keep their navy in port.
I was vastly outnumbered but I used a +5 attack general on one of their mega stacks and routed them. It was a long and bloody battle, but it ended in victory.
By the end of the war I had heavy losses, but they had heavier losses. I held all of Finland and their capital so eventually they accepted peace.
I got the Border Incident event and Russia tried to Invade me to retake Finland. I used this opportunity to try and Liberate those Finns who were under Russian oppression. Also Karellia is an important strategic location perfect for a defense line.
This war was a bit easier. I had advanced in Technology and still had a powerful general(I think it was the same +5 one, not sure now)
First they tried to attack me but failed to win and retreated. Soon after I attack St. Petersburg and kept the majority of their forces busy and eventually destroyed the bulk of their forces. They did try to sneak a force in behind my lines but my reserve army from Sweden took care of them.
Their navy at this point was more powerful, so it was a bit difficult. I suffered heavy losses to my navy but learned my lesson and began a major ship building plan.
The war ended with me capturing Karellia.
The 3rd and most recent war was helped by another Border Incident. However I did incur some Infamy in adding Latvia as a War Goal as well.
This war was an outright victory. By now I had machine guns and a +4atck, +1 Defense, +10%speed and Org general.
They huge armies, but I had superior weapons. Technology really helped here(and the fact that I have 100% plurality really sped up research).
I easily reached +25 from battles alone(It would have been +50 if not for a limit) and I had occupied large parts of northern Russia, Estonia, Latvia and I got as far south as Moscow.
They eventually came grovelling for peace.
Soon after I got the Place in the Sun Casus Belli against Great Britain and my next target is the West Indies. Meanwhile I will land an army of 24,000 men on their mainland and keep the pressure on.
The secret to beating russia, aside from building as many regiments as possible, is Technology and Generals. They seem to be lacking good tech.