"They are your men."
Translation:Jsou to tví muži.
The "to" is essential. It is the subject of the sentence and corresponds to These, Those or They. With a singular verb it would be This, That or It.
This is the "to je" "je to" "to jsou" "jsou to" pattern you can meet in many sentences in this course.
It is a very strange word order. Even if it were "Those men are yours." it is still strange.
For "They are your men." you should really keep "tví muži" together in the same way you keep "your men" together.
For other word order aspects, keep the SVO order unless you have a specific reason to use a different one.