If the us doesnt allow ukraine to do someting, what would stop them from doing it anyways?

Fragment of a discussion from Comments:Russia warns United States against allowing cross-border strikes by Ukraine

The US will stop giving them weapons. And Russia has already said Ukraine can't defend it's territory.

Me Da Wikipedian (talk)‎

Retrieved from "https://en.wikinews.org/wiki/Thread:Comments:Russia_warns_United_States_against_allowing_cross-border_strikes_by_Ukraine/If_the_us_doesnt_allow_ukraine_to_do_someting,_what_would_stop_them_from_doing_it_anyways%3F/reply#If_the_us_doesnt_allow_ukraine_to_do_someting,_what_would_stop_them_from_doing_it_anyways?_10928"