Today (26 January), India marks its 75th Republic Day. One of the most enduring parts of celebrations of this day is the impressive Republic Day Parade on Kartavya Path (formerly known as Rajpath). The grand parade will feature several contingents from the Army, Navy, Air Force and other para-military branches, along with impressive displays of military equipment, including tanks, missiles and fighter jets. This year, the President of France, Emmanuel Macron, will be the chief guest at the Republic Day parade after being invited for the celebrations. But why do Republic Day celebrations include a parade? What is the connection...