Dear fellow history buffs.
I read a book on the Soviet Army that is called, unsurprisingly, Inside the Soviet Army. Its author, Viktor Suvorov — not to be confused with the famous General Alexander Suvorov of the 18th century — mentions how Soviet doctrine of attack/envelopment came from Russian doctrine which was adopted from the one the Mongols used in the 12th century. Seemed like a long time ago, so I started looking into Russian engagements from the past (by that I mean country of Russia post say 1300) and saw a lot of instances when that tactic was used against them (Finland WWII, Germany WWI, Swedes in 1700s, French in 1800s).
However, if Suvorov is correct, then there must be at least one example of the Russians employing these tactics successfully against somebody over the past 700 or so years, otherwise, why would it be doctrine? Looking back, I haven't found anything that would indicate the Russians employed this strategy prior to WWII.
Were the Russians themselves ever successful enough in using a Mongol-style envelopment to crush their enemy (pre-WWII presumably with cavalry) such that such a tactic would become doctrine?