Did some distance measurement, because of why not.
Comparing the length of WWI Western Front with the Ukrainian one. Roughly.
WWI because the current situation is the most comparable from the past examples perhaps, or at least its fashionable to compare to that.

Which made me think how many scream "human wave tactics" when they see a footage of two dozen people advancing through a field in two-three files. Which is hilarious.
Our imagination is hugely influenced by what we can see in films. I don't think any can grab the full scale even on a small scale, but I heard the most realistic combat scenes are from movies made back in the '20s and '30s when WWI veterans were available to work as extras in the scenes. For example:
https://invidious.protokolla.fi/watch?v=fHuNQER_8rI
https://youtube.com/watch?v=fHuNQER_8rI [Embed]