Never said anything about red fort & army. I repeat, Nishan Sahib & Jaikaara is official war cry & flag of Sikh Regiment. Home minister, prime minister, president salutes to it in every republic day parade. Modi wears that Khanda symbol oh head when visting Gurudwaras.

Rajnath, on visit to a army post,asked a Sikh Officer to do the War Cry.

Link: for proof: Rajnath Singh asking for Jaikaara https://youtu.be/hkLx4X3yjeg