India has bought high altitude warfare kits from the U.S. on an urgent basis, officials with the knowledge of the matter said, a sign that the country is preparing for an extended winter deployment after talks to ease tensions along its border with China stalled. The Indian Army used an agreement which allows the two militaries to take logistical assistance from each other such as buying fuel and spare parts for warships and aircraft, for the transaction, the officials said, asking not to be identified given rules for speaking to the media. The Logistics Exchange Memorandum Agreement signed in August 2016 aims to promote interoperability between the two militaries.