Given the task definition and input, reply with output. In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Passage: Prior to 1947, Baltistan was part of the princely state of Jammu and Kashmir, having been conquered by Raja Gulab Singh's armies in 1840. Baltistan and Ladakh were administered jointly under one wazarat (district) of the state. Baltistan retained its identity in this set-up as the Skardu tehsil, with Kargil and Leh being the other two tehsils of the district. After the Maharaja of Jammu and Kashmir acceded to India, Gilgit Scouts overthrew the Maharaja's governor in Gilgit and captured Baltistan. The Gilgit Agency and Baltistan have been governed by Pakistan ever since. The Kashmir Valley and the Kargil and Leh tehsils were retained by India. A small portion of Baltistan, including the village of Turtuk in the Nubra Valley, was incorporated into Ladakh after the Indo-Pakistani War of 1971.
Link Information: none Question: How much square mileage in total did India retain?
Answer: none