The Army functions within the ambit of Indian Constitution & core values enshrined in the Indian Constitution, the Army chief said.
Two joint secretaries, 13 deputy secretaries and 25 undersecretaries were appointed in the department of military affairs.
General Bipin Rawat, who retired as the Army chief on December 31, has taken charge as India's first Chief of Defence Staff the next day.
Rawat held a meeting with important functionaries of Integrated Defence Staff and directed heads of various wings to come up with recommendations to bring in inter-service synergy and jointness.
The focus would be on ensuring best and optimal use of resources allocated to the three services, he said after receiving a Guard of Honour by the three services.
The Congress on Tuesday raised several questions over the appointment of General Bipin Rawat as the CDS, saying the government has started on a wrong foot on the issue.
Shavendra Silva's 58th division has been accused of violating international human rights laws, including shelling a hospital.
The "institution"of CDS carries tremendous responsibility of modernising the country's military forces, and reflecting the "hopes and aspirations" of 1.3 billion Indians, Modi said.
The national flower, lotus, is also a part of the uniform of the principal military advisor of the country.
The new department will have under it works relating to the three forces -- Army, Navy and Air Force.
Gen Manoj Mukund Naravane has commanded a Rashtriya Rifles battalion in Jammu and Kashmir and an infantry brigade on the eastern front.
Congress spokesperson Manish Tewari said the government has started on a wrong foot on the appointment and only time will unfortunately reveal the implications.
After a farewell Guard of Honour, Gen Rawat also hoped that the Army will rise to greater heights under the new chief Lt Gen M M Naravane.
Congratulating General Rawat on his appointment to the post, the chief minister said it is a matter of pride and honour for Uttarakhand.
Before becoming the Army Chief, Rawat handled various operational responsibilities in many areas, including along the LoC with Pakistan, the LAC with China and in the Northeast.