Hello Kreise and welcome to the forums! Do you have a replay or some other hints so that someone can easier start an investigation?

The pull request has been merged by @Vantha. Thank you very much for reviewing Vantha and @wowgetoffyourcellphone!

A similar issue was recently addressed: https://gitea.wildfiregames.com/0ad/0ad/issues/8580 https://gitea.wildfiregames.com/0ad/0ad/pulls/8589

That's not exclusive for large maps or units with different speeds. If you have no formation: Each unit try to get to the destination without collision resulting in this line like ducklings. You can set the destination before the enemy base to regroup. Formations have big problems on their own for path finding. Some players (not me) just activate formation short before a attack so the units run in the formation (a speed slightly faster that normal walk). For new units from the barracks you could make batches. But loose unit groups are vulnerable. If you find such a line and can attack it with a group you can take out a lot of units with without taking much damage. A basic aspect is to attack few units with a lot. It's the players duty to run from outnumbered fights or attack when you are stronger. So: Yeah, but what do you want the game to do about it? You can set the regrouping point before the battle and send them in when you feel ready.

There's a problem with playing on large maps: the movement of units. Units have different movement speeds, and those that arrive first tend to attack first. Sometimes these units wait for those who arrive later to regroup, but more often than not, they don't. The result is a long line of soldiers charging headlong into death. Could this be improved by choosing a regrouping point and making the attack only begin when enough units are present?