Its fairly common knowledge know how the so-called "Blitzkreig" tactics in WWII worked, however I have heard Soviet tactics described mainly as "Deep Battle (or Deep Operations)" but also as "Attack in Echelon," and "Consecutive Operations".
What did these facets of doctrine actually entail in the tactical and strategic sense? How did they differ from the common perception of Blitzkreig?
Edit: Dammit! WWII not WII......
Technically speaking, Deep Battle is the name for the tactical doctrine, while Deep Operations is the strategic doctrine. Deep Battle dictates that attacks are split into three groups, or echelons. The first group would make contact with the enemy, and would create the breakthrough. The second echelon would exploit the breakthrough on a tactical scale. The third echelon would then be committed to attack the operational depth. This force could also, if necessary be used to reinforce the second echelon. This is the "Attack in Echelon" you mention. Moving to a strategic scale, the basics are still the same - the first echelon creates the breakthrough, the second exploits, the third is a reserve for later exploitation or reinforcement. In an ideal situation, aerial and airborne forces are deployed behind the front line to delay and defeat enemy reserves in detail. While aerial forces were commonly used by the Russians, there were very few cases where their airborne forces were used in this role. The exploitation forces aim to create a situation where the forward forces of the opposition cannot fight by destroying their logistical base, before moving on to exploit their strategic depth.
In their simplest form, both Deep Battle and Blitzkrieg appear highly similar - they both rely on breaking the opposition's front line in order to allow mechanised forces to advance behind the lines. The main differences centre on the aims of the mechanised forces and the means of producing a breakthrough. In Blitzkrieg, the breakthrough is created by a concentrated attack at a single point for each strategic direction attacked. Armoured forces are in position behind the point of attack to exploit this breakthrough. In Deep Battle, attacks are made along the whole front of the battle. At any point where a breakthrough is created, mechanised units are committed to exploit it. In Blitzkrieg, the aim of the armoured forces is to destroy the forward forces of the opposition by creating an encirclement. In Deep Battle, the aim is to destroy the ability of the opposition to fight by destroying their operational rear - the logistics, command and support that the forward forces require to fight. Once this is achieved, operations can then be continued into the opposition's strategic depth - the bases from which they operate.