I can only say that this world has far exceeded your imagination.
Frankly, the level of fighting in the Conflict between India and Pakistan did not match that of the War between the Soviet Union and Germany in WW2. Of course, weapons today are far more advanced than they were during World War II. But the level of training of the army, the level of education of the commanders, and the organizational and logistical ability of the army as a whole are far inferior.
Chinese military enthusiasts have done military simulations with the US. Just two army brigades fighting each other, without any air support, long-range fire, tactical missiles. Within 2 hours, both sides suffered more than 40% casualties and were incapacitated. Nearly half of the armored vehicles were destroyed, and 70% of the artillery was destroyed.
A modern level of war doesn't take much time. Imagine how quickly the entire war would move if you added air force, long-range artillery, and missile units to the fray.