Hello. I tried to attack an army of allies privateers. I tried to attack peaceful armies. Captured allied cities. I checked the game files. Reset the game. But I can not get this achievement in any way. It is a last achievement. I do not use mods. Help please solve this problem.

This video shows how I attack with privateers. Tell me if I did something wrong.  https://youtu.be/Gu8RMAw9ng8