Two brothers who filled out online application forms to join Islamic State were jailed yesterday.
Haleem Heyder Khan, 21, and his brother Hamzah, 18, also made homemade videos in which they spoke of martyrdom.
The Birmingham brothers were being advised by hate preacher Anjem Choudary, the city's crown court heard.
Detective Chief Superintendent Mark Payne, of West Midlands counter-terrorism policing, warned they could have been 'redeployed back to the UK' – had they made it to Afghanistan.
#JAILED | Two Birmingham brothers have today been jailed for a terrorism offence.
The pair had become increasingly radicalised and had prepared to travel to Afghanistan so they could join in and support terrorist activity.
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Jailing them, Judge Melbourne Inman KC said: 'It is clear beyond doubt that you decided to join and fight with a terrorist organisation that glorified in the murder of anyone who did not share their views.
'You have deep-rooted extremist views and support for terrorist action – whether you have rejected those views, time will tell.'
Haleem was jailed for ten years while Hamzah, who was 17 at the time, was handed an eight-year term.
The brothers were found to have encouraged others to 'shed' the blood of non-believers, as well as having threatened former prime minister David Cameron.
They used Instagram to get in touch with an Islamic State recruiter who sent them forms to fill out in Arabic and a code to access messages on the encrypted Whatsapp messaging service.
They bought clothing and equipment, obtained travel documents and completed the application forms with their address and postcode in Ward End.
The pair were given advice by Choudary, who is now facing unrelated charges for directing a terrorist organisation.
Hamzah was said to have an 'entrenched' extremist ideology and was 'particularly responsive to the guidance' from Choudary, the court heard.
The brothers got in touch with ISIS through Instagram and filled in an application form online
The men were seeking to join Islamic State Khorasan Province which is said to receive 'support and direction' from ISIS.
The brothers pleaded guilty to engaging in conduct in preparation for terrorism.