Sentence:  As I <WSD>dug</WSD> in behind one of the bales we were using as protection , I grudgingly found myself agreeing with Oso 's logic , especially when I imagined what would have happened to Missy if Old Knife 's large party of screeching warriors had overrun our company . 
Meaning of the word marked with <WSD> tags:  occupy a trench or secured area