Sentence 1: In January 1938 he became the head of the 64th department and chief of staff of the 2nd Manghud - Border - Detachments .
Sentence 2: In January 1938 , he became head of the 2nd department and chief of staff of the 64th Manghud Border Detachment .
Question: Do Sentence 1 and Sentence 2 express the same meaning? Yes or No?