Big Serge discusses the state of the Germans on the Eastern Front at the end of the massive Soviet attacks that collapsed Army Group Centre in 1944:

But now, as Bagration began to run out of momentum, the Soviets really did put Model’s army group in the crosshairs with an enormous follow up offensive — the second phase of their summer blockbuster. Model’s army group consisted of two Panzer Armies (the 4th and 1st), and an allied Hungarian force guarding the southern flank. On paper, a pair of Panzer Armies was a formidable force, but like all German units at this stage in the war they were understrength, and by this point they were already bleeding strength as panzer divisions were scrambled north to try and slow down Operation Bagration.

Arrayed against Model’s force were two Soviet Fronts (the equivalent of an Army Group) under a pair of the Red Army’s best operators. The lead off assault came on July 13, with Marshal Ivan Konev’s 1st Ukrainian Front forcing positions in the interstitial zone between Model’s two Panzer Armies. Konev’s intention was to split the two armies apart, force a penetration between them, and then curl into the rear to encircle one, or if possible both of them. Therefore, Konev’s initial assault was highly concentrated, with as much as 70 percent of his artillery and 90 percent of his armor assembled in a few narrow sectors selected for breaching.

With this level of force concentration by the attackers, there was really little that the Germans could do. Nevertheless, a somewhat lethargic and stiff German response helped make the disaster even worse. 4th Panzer Army headquarters initially believed Konev’s opening assault to be only a local attack – later defensively arguing that “there were as yet no signs of the attack being extended to other sections of the front” — and so attempted to respond with local counterattacks by its own reserves. As a result, by the second day of the Soviet offensive the Panzer Army had already committed all of its organic reserves while failing to withdraw from defensive positions that were already compromised. By the time they realized that Konev was launching a serious offensive operation, it was too late. Konev had already bashed into critical seams in the German front, turning his forces into a giant splitting wedge, in place to pry the whole front open.

[…]

What the Soviets had achieved with their enormous assaults on Army Group North Ukraine was remarkable. By precisely targeting the seams in the German formations, the initial attacks had pried open the German position like a clam, forcing the two panzer armies to retreat in opposite directions — the 1st pulling back to the south towards Hungary, and the 4th withdrawing westward towards Krakow. These diverging withdrawals opened enormous voids in the German line — the official German history of the war simply refers to this sequence of events as “the loss of a continuous front”. In a war where the enemy wielded vast mechanized forces, such gaps were fatal.

Rokossovsky and Konev had essentially overrun an entire German army group — and the best equipped group in the east, at that — in the space of about ten days, wedging the German line open and creating vast voids to drive into. Most importantly, Rokossovsky now faced one of the more tantalizing opportunities of the entire war. A great space now beckoned him to drive north towards Warsaw, and in his path was only the tired remnant of German second army — a force with no armor whatsoever, caught completely out of position.

Any wargamer could look at the map as Rokossovsky saw it and see that the opportunity to win a seminal, world-historical victory was now within reach. A sharp drive on Warsaw would put him in position to not only capture the city (a major transportation, administrative, and supply base), but also smash through the threadbare German 2nd Army and drive to the Baltic Coast. If he could achieve this, fully half of the German eastern forces would be encircled — the entirety of Army Group North (still fighting on the Baltic Coast) and everything that remained of Army Group Center. Rokossovksy now saw little standing between his powerful Front and one of the greatest encirclements — perhaps the greatest — of all time. No less than six German armies were sitting, naked and vulnerable, on the proverbial silver platter.

The Eastern Front was on the verge of total collapse. If Rokossovsky could bash through Warsaw (a seemingly simple proposition, given the enormous overmatch that he enjoyed over German 2nd Army), he would wipe out half the German eastern army and face no meaningful German forces between him and Berlin.