Sentence:  Since the strength of the Mexicans had been underrated , too small a posse had been collected , and since the deputy had not been provided with <WSD>search</WSD> warrants , MacPherson and his men decided it was much wiser to withdraw . 
Meaning of the word marked with <WSD> tags:  a warrant authorizing law enforcement officials to search for objects or people involved in the commission of a crime and to produce them in court; the warrant describes the locations where the officials may search