Hello.

Please help me with the article in the sentence: "Protesters are accusing (?)the military forces of human rights abuses."
Will the situation change if an adjectice is used, for example: "Protesters are accusing (?)the Yemeni military forces of human rights abuses." Maybe no article at all in both cases?
Thank you.

You can either use "the" in both sentences or not. It doesn't make any difference.

Your second sentence, of course, is much more specific since it refers to a particular country's military forces. With or without "the," the meaning is still clear.

Hello! In the sentence "Protesters are accusing (?) the military forces of human rights abuses," the appropriate article to use is "the." The definite article "the" is used to refer to specific or particular military forces that the protesters are accusing.

If you add the adjective "Yemeni" to the sentence, it would read: "Protesters are accusing (?) the Yemeni military forces of human rights abuses." In this case, the appropriate article to use is still "the." The adjective "Yemeni" modifies the noun "military forces," but it does not change the usage of the article.

So, in both cases, you would use "the" before "military forces" to indicate that the protesters are accusing a specific group of military forces. There is no need to use an indefinite article (a/an) or omit the article entirely in this context.