Recently Indian airforce has celebrated 40 years of operation Meghdoot which led to the capture of Siachen glacier.
About
The Siachen Glacier is a glacier located in the eastern Karakoram range in the Himalayas just northeast of the point NJ9842 where the Line of Control between India and Pakistan ends.
The Siachen Glacier lies immediately south of the great drainage divide that separates the Eurasian Plate from the Indian subcontinent in the extensively glaciated portion of the Karakoram sometimes called the "Third Pole".
The entire Siachen Glacier, with all major passes, is currently under the administration of India since 1984 (Operation Meghdoot).