You've clearly never read Glantz, as he's easily the most pro soviet western military historian of the Second World War and routinely comes after casualty figures with a goal of presenting a soviet friendly picture that other historians - who work from either German or mixed sources - disagree with.
This person is responsible for reducing the number of Axis countries on the Soviet-German front. (Possibly unintentional).
Https://en.wikipedia.org/wiki/Eastern_Front_(World_War_II) #Forces
According to his table (June 1942), it can be seen that the total strength of the Axis forces is 3.7 million. The USSR is 5.3 million. Now, the simple question is: how do the Axis countries having 1.6 million fewer start a new offensive in the southern sector of the front? Supermen? No. Simply Glantz does not take into account the Luftwaffe, Kriegsmarine, SS, the organization of Todt and perhaps something else. The Western man does not think about this (the majority) and believes in the super strength of the German army, which fights with the multiply superior enemy. This is an element of propaganda. Soviet sources give the following cisals:
Germany (without allies) - 5.65 million. The USSR - 5.5 million. It's more like the truth.
You know that the Soviets:
* had invaded Poland in 1919-1920
This war began on the initiative of Poland:
In 1919, after the departure of the German army, the Red Army came to the territory of Belarus and Lithuania. January 10, 1919 Minsk was taken and the Belarusian SSR was proclaimed. On January 27, Lithuania was taken, and the republic became the Lithuanian-Belarusian SSR. On February 3, the republic joined the federation with the RSFSR.
On the other hand, Polish troops were being drawn up, with the aim of restoring Polish borders within the Polish-Lithuanian Commonwealth. On February 9 - 14, 1919, the Polish units occupied the Kobrin-Pruzhany line. The Polish-Soviet front was formed. There was a Civil War in Russia, Denikin was in power - and, using the convenient moment, the Poles struck the Red Army, forced to spray forces on several fronts.
On February 28, the units of General Ivashkevich were attacked by Soviet troops on the Shchara River and on March 1 they occupied Slonim.
On March 2, the parts of Listovsky were taken by Pinsk.
On April 19 the Poles occupied Lida, Novogrudok, Baranovichi and Vilna.
On April 28 the Poles occupied Grodno.
On June 25, the Council of Foreign Ministers of Great Britain, France, the United States, Italy authorizes Poland to occupy eastern Galicia.
July 4, Molodechno was occupied by the Poles.
July 25 - Slutsk.
August 9 Poles take Minsk.
On August 29, the Poles took Bobruisk.
Further, a truce was concluded and a diplomatic struggle began with the participation of Poland, the Entente and Denikin.
On December 8, 1919, the Supreme Council of the Entente, as the eastern border of Poland, recommended the Curzon Line. However, the Polish troops were much more east, and the occupied territories refused.
After the Polish-Soviet negotiations began, they also failed.
In early January 1920 the Poles resumed hostilities. Was taken Dinaburg.
On March 6, the Poles launched an offensive in Byelorussia, taking Mozyr.
On April 25, 1920, the Polish troops, possessing threefold numerical superiority over the Red Army, attacked the positions of the Red Army along the entire length of the Ukrainian border and by April 28 occupied the Chernobyl-Kozyatin-Vinnitsa-Romanian border line. The troops of our 12th Army lost their unified command. Poles captured more than 25 thousand Red Army men, captured 2 armored trains, 120 guns and 418 machine guns.
On May 7 the Poles occupied Kiev.
On May 14, the counteroffensive of the Red Army began, the very thing that the mythmakers issued for "aggression against Poland."
On June 10, the Poles left Kiev - and further they were driven almost to Warsaw, where luck turned away from the Red Army. But this is a completely different topic.
maintained imperial Russian claims to Polish territory
This was done after the war broke out and a decision was made to "Sovietise" Poland.
* actively conducted espionage and communist recruitment in Poland
Because the "world revolution" is a way of surviving a weak Soviet Russia surrounded by a hostile capitalist world.
was not willing to guarantee polish sovereignty and territorial integrity before entering polish lands
If Poland violates the territorial integrity of Russia, then why should Russia comply with the Polish one?
later conspired to steal large chunks of poland
With whom did he come to an agreement? With Germany? Read the text of the secret protocols.
* conducted ethnic cleansing to remove poles from soviet territory
The purges were not ethnic (Ussr - international state), but class. They were conducted against anti-Soviet activities.
conducted extensive war planning against Poland throughout the interwar period
Poland does the same. This is normal work for the general staff of any country.
suggested that Poland be the fighting ground for two states that were both hostile to Poland.
If this is the only chance to stop Hitler by "little blood", then why not? Is it better to be occupied (1939-1945)? Ok.
You keep making ridiculous assumptions, playing fast and loose with facts and refusing that source even one of your claims with anything more than Wikipedia or books you found on Wikipedia.
What are my words "ridiculous"? What's wrong with Wikipedia? It's just a source of information.