Battle of New Stalingrad

The Battle of New Stalingrad (ニュースターリングラード攻防戦) was the largest land battle of World War 3.

Prelude
The Underworld Legion had invaded much of the Eurasian Union's territories in the Caucasian and Central Asian regions.

On the start of summer 2035, Underworld swarms of over 400 million strong were stationed on both sides of the Eurasian city of New Stalingrad, which was formerly known as Volgograd prior to the Second Russian Revolution.

The Battle
The Underworld forces besieged the city, with the massive Eurasian army vigorously defending it. Within the first day of battle, over ten million from both sides were already killed in combat.

The battle even devolved to brutal urban fighting in the streets of the city.