Sentence:  Its entire complement of non-commissioned officers on the <WSD>platoon</WSD> level had departed as cadre for another unit , and its vehicles were still those used in the drive across Luzon in World War 2 , . 
Meaning of the word marked with <WSD> tags:  a military unit that is a subdivision of a company; usually has a headquarters and two or more squads; usually commanded by a lieutenant