system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter/Wizarding World] If Voldemort ever won the Battle of Hogwarts and took complete control over the Ministry of Magic, how would the other magical countries/governments react to this?
gpt
Voldemort had already taken control over the Ministry of Magic at the start of Deathly Hallows, and there was no reaction from the the international community at all. 

There were a few mentions of fleeing abroad, so it's likely that some places were at least accepting refugees, but doing little else. Most likely they would be either unwilling or unable to intervene against Voldemort.