Kabul was a city in Afghanistan occupied by the British Army and besieged by the Afghans in or around 1842, during the First Afghan War. Barbara Wright and Ian Chesterton were in the city during this siege. Akbar Khan eventually arranged for the Army's surrender and the British marched out of Kabul on a fateful journey towards Jalalabad. (PROSE: Mire and Clay [+]Gareth Wigmore, Short Trips: A Universe of Terrors (Short Trips, 2003).)
Much later, Izzy Sinclair was in Kabul, where she wrote to Maxwell Edison to tell him that she'd found something "amazing" there. (COMIC: The Stockbridge Child [+]Dan McDaid, DWM Comics (Panini Comics, 2008-2009).)