Captain Shiva Chauhan from the Corps of Engineers has been posted at a frontline post in Siachen Glacier, in first such operational deployment of an woman Army officer at the worlds highest battlefield.The officer was posted at the Kumar post, located at an altitude of around 15,600 feet in Siachen, on Monday for a three-month stint after she underwent rigorous training, Army officials said.Defence Minister Rajnath Singh conveyed his best wishes to Capt Chauhan and said he was happy to see more women joining the armed forces and take every challenge in stride.