NEW DELHI: The foundation stone for the new Army headquarters or the ‘ Thal Sena Bhawan’ (TSB), which will house 1,684 officers and 4,330 other staff personnel by bringing together the eight existing offices of the force in different parts of the Capital, was laid by defence minister Rajnath Singh at Delhi Cantonment on Friday.The TSB, spread over 39 acres to include the 6,104 offices in a multi-storey “green” building complex with parking, will take at least five years to be completed at a cost of around Rs 750 crore. “All the departments of the Army as well as the (new) Department of Military Affairs will come under one roof here,” said defence minister Rajnath Singh.Though most Army officers will shift to the new TSB opposite the Manekshaw Centre in Delhi Cantonment when it comes up, the brass will continue to work from the South Block on the Raisina Hill complex or where the defence ministry is shifted under the proposed Central Vista redevelopment project.“The offices of senior functionaries in the Army, including the chief and vice-chief, will always be co-located with the Raksha Mantri’s office, wherever it may be” said Army chief General M M Naravane.