A report on First Polish Army (1944–1945)

What became the LWP was formed during World War II, in May 1943, as the 1st Tadeusz Kościuszko Infantry Division, which developed into the First Polish Army, unofficially known as Berling's Army.

It was enlarged and reorganised into the Polish First Army (Berling's Army) and the Polish Second Army.

Berling was a co-founder and commander of the First Polish Army, which fought on the Eastern Front of World War II.

1st Polish Army (General Stanislav Poplavsky)

By 14 September, the eastern bank of the Vistula River opposite the Polish resistance positions was taken over by the Polish troops fighting under the Soviet command; 1,200 men made it across the river, but they were not reinforced by the Red Army.

The first plans called for the formation of Polish Second Army and Polish Third Army, which were to be joined with the Polish First Army into a Polish Front (at that time the Polish forces were part of the 1st Belorussian Front).

The three Soviet fronts had altogether 2.5 million men (including 78,556 soldiers of the 1st Polish Army), 6,250 tanks, 7,500 aircraft, 41,600 artillery pieces and mortars, 3,255 truck-mounted Katyusha rocket launchers (nicknamed 'Stalin's Pipe Organs'), and 95,383 motor vehicles, many manufactured in the US.

In 1943 he became one of the generals charged with the creation of the Soviet-controlled Polish Armed Forces in the East, the 1st Polish Army.

On 17 January 1945 – after the beginning of the Vistula–Oder Offensive of the Red Army – Soviet troops and Polish troops of the First Polish Army entered the ruins of Warsaw, and liberated Warsaw's suburbs from German occupation.

Formed in the Soviet Union, it was the first division of the First Army (Berling Army), and of what later became the post-war Polish Armed Forces (Ludowe Wojsko Polskie) after defeating the Nazi regime and liberating Poland.