

What makes you think they’re pushing 10k people past their trenches at all times?
This statement is about the battlefield. The area between fortifications. Given a M777 howitzer has a range of 21-40 km based on type of shell.
If we go by the most extreme expectations, then the battlefield will be at least 10 kms wide - As both sides will keep artillery a bit further back to protect them against enemy artillery fire.
To get the expert infantry badge in the US army, a soldier needs to be able to march with full equipment at 6.33 km an hour. It’s fair to assume the Russian soldiers running into their death aren’t spotting full equipment. So if we’re setting it a bit high they might be able to move 5 km during the 30 minute expected kill time.
The numbers are similar for the other side of this fight. It means the only way to push the battle lines is by using equipment








I would assume fortified positions do not count as battlefield