Excerpts:


New Delhi had blamed Islamabad for backing militants who carried out an attack the previous month in Indian Kashmir, which killed 26 civilians. Despite Islamabad denying any involvement, India had vowed a response, which came in the early hours of May 7 with air strikes on Pakistan.


Sidhu ordered Pakistan's prized Chinese-made J-10C jets to scramble. A senior Pakistani Air Force (PAF) official, who was present in the operations room, said Sidhu instructed his staff to target Rafales, a French-made fighter that is the jewel of India's fleet and had never been downed in battle.


"He wanted Rafales," said the official.


The hour-long fight, which took place in darkness, involved some 110 aircraft, experts estimate, making it the world's largest air battle in decades.


The J-10s shot down at least one Rafale, Reuters reported in May, citing U.S. officials. Its downing surprised many in the military community and raised questions about the effectiveness of Western military hardware against untested Chinese alternatives.

But Reuters interviews with two Indian officials and three of their Pakistani counterparts found that the performance of the Rafale wasn't the key problem: Central to its downing was an Indian intelligence failure concerning the range of the China-made PL-15 missile fired by the J-10 fighter. China and Pakistan are the only countries to operate both J-10s, known as Vigorous Dragons, and PL-15s.

How Pakistan shot down India's cutting-edge fighter using Chinese gear