outrance

But a narrow bridge over a deep gulf is a bad place for a battle outrance.

Between the members of that society, at any rate, it was not to be pursued outrance.

Outrance, owt′rans, n. the utmost extremity: the bitter end.

The end of it was a combat à outrance in the meads by the Loire, with all Tours on the walls to behold it.

He had the ill luck to push his sports too far; and did kill a knight of Lancashire in a battle à outrance.