Some quotes from this review of the late Saleem Shahzads book inside Al Qaeda and the Taliban: Beyond Bin Laden and 9/11 by Khaled Ahmad.
'There were at least 600,000 youths there since 1979. At least 100,000 Pakistanis were active members or different Jihadi cadres. Over 1 million students were enrolled in various Islamic seminaries, and there were several hundred thousand supporters of Pakistan's Islamic religious parties. The main handler of the Afghan Jihad against the Soviets had been Pakistan's army, which itself was not immune to the influence of radicalism. Several army officers had pledged their allegiance (bait) to different Jihadi spiritual leaders, including Maulana Akram Awan of Chakwal. These groups were known in the Pakistan Army as pir bhai groups. pg 9
and this one...
'Major Haroon Ashiq hung up his boots right after 9/11. On his release from service, he joined LeT. One of my unit officers Major Abdul Rahman also followed suit. I joined the outfit soon after, without caring for the consequences' (p. 83).
For Captain Khurram faith came before country. While on a UN mission in Sierra Leone he clearly demonstrated it: 'Khurram built a mosque and a Madrassa in Sierra Leone, despite the opposition of his commander, Brigadier Ahmad Shuja Pasha, later chief of the ISI' (p. 85). Both brothers had joined the LeT, but had soon 'realised that the LET was just an extension of Pakistan's armed forces' (p. 86).