1,000 is the standard amount of artillery and tanks the Soviets used during WW2 esp. at Kursk. The NVA reportedly used the same number during their final offensive in South Vietnam.
Don’t know the numbers the No. Koreans and Russians used in the initial invasion of So. Korea in 1950 but I’ll bet it was Significant too.
videos:
1- Nothing special to see here. Just the casual traffic on a road in Ukraine.
https://fb.watch/fuuuAGbLmk/
2- Russia’s ‘rigid’ forces collapse to ‘audacious lightning’ Ukraine counteroffensive
https://www.youtube.com/watch?v=-66Sz_0WGFk
I think North Korea had a single armored division in 1950. But South Korea had none, and initially the US/UN forces had very few.