247: What are such structures called? What was their purpose? (The name of such structures is still used to refer to the modern day equivalents in the local languages. )

246: Marshal of the Air Force Arjan Singh – he is the only officer of the Indian Air Force to be promoted to five star rank, (as of February 10, 2009) equal to a Field Marshal, to which he was promoted in 2002. With the death of Field Marshal Sam Manekshaw in June 2008, he is presently the only living Indian military officer with a five-star rank.