Proskurov–Chernovtsy offensive
Kamenets–Podolsky pocket

The Battle of the Kamenets–Podolsky pocket (or Hube Pocket) was part of the larger Soviet Proskurov–Chernovtsy offensive (Russian: Проскуровско-Черновицкая Операция, Proskurovsko-Chernovitskaya Operatsiya), whose main goal was to envelop the Wehrmacht's 1st Panzer Army of Army Group South. The envelopment occurred in late March 1944 on the Eastern Front during the Dnieper–Carpathian offensive. It was the biggest and most important operation of the Dnieper–Carpathian offensive.
The Red Army successfully created a pocket, trapping some 220,000 German soldiers inside. Under the command of General Hans-Valentin Hube and with the direction of Field Marshal Erich von Manstein, the majority of German forces in the pocket were able to fight their way out by mid-April in coordination with the German relief forces led by the 2nd SS Panzer Corps, which was transferred from France with just months before the Allied D-Day landings.
Although the majority of the 1st Panzer Army was rescued, it came at the cost of losing almost the entire heavy equipment and a significant territory while many divisions ended up being shattered formations, which required thorough refitting.
This Soviet offensive and the ongoing crisis had absorbed all German strategic reserves that could otherwise be used to repel the future Allied D-Day landings or Soviet Operation Bagration. All told, 9 infantry and 2 panzer divisions, 1 heavy panzer battalion and 2 assault gun brigades with a total strength of 127,496 troops and 363 tanks/assault guns were transferred from across France, Germany, Denmark, Poland, Balkans to the Ukraine between March–April 1944. In total, the German forces stationed in France were deprived of a total of 45,827 troops and 363 tanks, assault guns, and self-propelled anti-tank guns on 6 June 1944.
Although the Soviets were unable to destroy the 1st Panzer Army, they did achieve major operational goals. With the Soviet 1st Tank Army crossing the Dniester river and reaching Chernivtsi near the Carpathian Mountains, the 1st Panzer Army's links with the 8th Army in the south had been cut off. As a result, Army Group South was effectively split into two – north and south of Carpathians. The northern portion was renamed to Army Group North Ukraine, while the southern portion to Army Group South Ukraine, which was effective from 5 April 1944, although very little of Ukraine remained in German hands. For the Wehrmacht defeat, the commander of Army Group South Erich von Manstein was dismissed by Hitler and replaced by Walter Model.
As a result of this split, the Soviets had cut the main supply lifeline of Army Group South, the Lviv–Odessa railway. Now, the southern group of German forces would have to use the long roundabout route through the Balkans, with all of the supplies being rerouted over the Romanian railroads, which were in poor condition.
Just how much exactly did Hube's 1st Panzer Army lost during the encirclement is unknown. However, it is clear that the equipment losses were exceptionally high, as hundreds of precious tanks, assault guns and trucks were lost principally through their abandonment in the mud, while tangible losses were sustained in manpower as well.
For example, by the end of the breakout operation, the 19th Panzer Division no longer had any operational tanks left, the 20th Panzer-Grenadier Division had 1 StuG left. Meanwhile, the 6th Panzer Division had only 2 Panthers left, the 17th Panzer Division had 1 Panzer IV left, while the 509th Heavy Panzer Battalion had only 1 Tiger tank left.