Rensslaer, thanks for the comment!
When referring to pocket clearing, you must place it within a given context. The situation in 1942 was not the same as in 1943. In 1942 my army was neither so big nor so modern as it currently is AND the Soviets had both air superiority and numerical superiority (land-wise). The result was that when my tanks made several breakthroughs, their ORG was very low. Therefore, I couldn't just keep pushing forward.
In 1943, however, I don't have to bother with the Allies (so I can use my planes on the Eastern Front) and my army is better (and bigger) now. Most of my SS Armoured divs (medium tanks + MEC/MOT + SPART/SPRART) and Mechanised/Motorised divs (MECH/MOT + TD + SPART/SPRART) are still relatively fresh after all that action, so I can achieve new breakthroughs and encirclements. I've also changed my tactics a bit. In 1942 I've had problems with holding the pockets, because my fast units were very spread out and surrounded by enemy troops. It caused several disturbances. Let me illustrate this.
This is a typical situation from 1942. Enemy units are encircled in a sizeable pocket and my foot infantry is "guarding" them from the left, while my mobile divs are holding the pocket on the right. The problem is, of course, the fact that the enemy can attack my Armoured and Mechanised/Motorised divs and I cannot do much about it. It is even worse when they attack in several provinces at once, because then my units are "engaged" and I cannot freely reinforce other units. I must "retreat" into a province which hold my units, BUT it's not possible if enemy units are still there (usually they are retreating, but it takes time for the infantry). Therefore, it was relatively easy for the enemy to win a battle in at least one province. Even if it didn't allow the enemy troops to escape, the encircled units could get fresh supplies.
Therefore, it was hard to hold the pockets and even harder to reinforce the units guarding them. However, you must keep in mind that I rarely used my Armoured/Motorised divs to clear the pockets - usually I left such tasks to the infantry. Still, in order to cut through the vast Soviet armies, I had to concentrate my mobile forces, which took time and was hard to do when a big pocket had to be held.
Of course, I could just wait until the AI units ran out of supplies while performing Logistical Strikes, but there are several problems with that. Firstly, I used Logistical Strikes in several cases
. Secondly, the pockets were simply too big. This meant that unless they were reduced, I had to guard many provinces and stretch my lines. When the pocket was reduced to one or two province(s), it became a low threat and I didn't use big forces to "contain" it. Thirdly, even if I don't attack the enemy directly, I still have to use some units to guard the provinces around the pocket.
You must also keep in mind the fact that I gave the AI some bonuses. If you read the first post in this thread, you will see that the AI has decreased supply consumption (!), better supply throughput, vast MP/Officer/IC bonuses, ORG bonus, reinforcement bonus and ORG regain bonus (while I gave myself ORG regain PENALTY). All this means that my job is harder while AI's job is easier.
It was clear that I had to change my tactics. My situation at the end of 1942 wasn't that bright (the Soviets even managed to perform an offensive in southern Poland), but I used the winter of 1942/1943 well, I think. I upgraded my army, reinforced my troops, took care of the Allied threat, reorganised my forces (so that I could concentrate enough mobile divs in just one or two places) and increased the size of my army and airforce at the same time.
I wrote about it in the AAR, but I found that using foot infantry to the greater extent in the process of pocket creation AND creating several smaller pockets "inside" a big one worked well. The efficiency of this tactics is clearly visible in my last operations.
Lastly, I will repeat this again -
force concentration is the key when fighting the numerically superior enemy. I think that in several cases in 1942 I was overly ambitious and tried to achieve too much at once. My mobile forces were not strong enough to perform so many breakthroughs and encirclements as I wanted them to perform
This caused them to lose ORG quicker and at a greater rate, which is hard to replenish in time (this is a general problem in HOI3, especially for the defender - the latest patch should help with that, though).