Just read this article on the Battle of Kasserine Pass

America's Most Humiliating Defeat

The author made the following statement regarding British help during the battle:

As at the Battle of the Bulge, it wouldn’t be the last time that the British helped “tidy up” an American disaster.

I seem to recall the 3rd Army riding to the rescue, not the British. He implies there might have been other times too. Any idea what this author is talking about? TIA