 Between 1963 and 1967 the British administration faced a low intensity insurgency from groups of armed Arab nationalists who were seeking independence for Aden and competing for future power after the inevitable British withdrawal.This insurgency was designated the "Aden Emergency".In late June 1967 the 1st Battalion Argyll and Sutherland Highlanders was due to take over responsibility for security in Aden's Crater district from the Royal Northumberland Fusiliers.