Sentence:  We had been out on a <WSD>route-march</WSD>. You know, I daresay, that nowadays a <WSD>route-march</WSD> is not simply a matter of marching. In a <WSD>route-march</WSD> there is involved a certain amount of field training. 
Meaning of the word marked with <WSD> tags:  A long march for training purposes.