Sentence:  I'll follow you, Floating Tom, into the Mingo camp, on such an arr'nd, and will strive to do my duty, should we <WSD>come to blows</WSD>; though, never having been tried in battle, I don't like to promise more than I may be able to perform. 
Meaning of the word marked with <WSD> tags:  To fight; to initiate physical conflict, especially subsequent to escalating tension or antagonism.