I've seen 2 wolverines take down a pack of 5 wolves.
Seriously, we were out snowmobiling one day on a large lake. In one of the back coves we were sitting on a hill overlooking the lake. Saw 2 wolverines attack and take down a pack of 5 wolves.
Unfortuantly this was a time before cell phones so no video or pics could be taken. But the old guy that lives by the lake has seen them many times and took video of them one time to send to the DEC. They say no wolverines live in our area. Since they recieved the video, they actually came up here to do a study and found many live in the Adirondack mountains.