On April 3, 1967, residents of Aden, on the Arabian Peninsula, waved anti-British banners, and the British Army retaliated with riots. Urban warfare broke out around Aden, and casualties fell in the streets after being shot by British troops.

　In Aden, Yemen, on the southern tip of the Arabian Peninsula, residents waved anti-British banners and chanted nationalist slogans as they ran through town on April 3, 1967. The British Army's Royal Northumberland Fusiliers retaliated against the riot. Urban warfare broke out around Aden, and casualties fell in the streets, shot by British troops.

　A UN mission to Aden, Yemen, on April 2, 1967, ended in vain when the National Liberation Front (NLF) called for strikes on April 2, crowds gathered in the streets, terrorists threw grenades and sniped at troops, and on April 3, the tempo rose, especially in Sheikh Osman. Banners reading "disperse or we will open fire" were hastily rolled up, and urban warfare tactics briefly prevailed. The police station in Aden was surrounded by Yemeni rioters and rescued by the 3rd Battalion of the Queen's Dragon Cavalry and armored vehicles; after a calm day on April 4, the riots exploded again on April 5 and the UN mission was escorted to the Al Mansoura detention center. The visit caused havoc inside the center, and heavy gunfire outside the detention center. Finally, on April 7, the UN mission evacuated Aden. Taking advantage of the delegation's visit, the terrorists who had tried to take over Sheikh Othman withdrew.

　The Aden Emergency, also known as the October 14 Revolution of 1963, saw the outbreak of an armed insurgency by the National Liberation Front (NLF) and the Liberation Front of Occupied South Yemen (FLOSY) against the British protectorate of the South Arabian Federation. It led to the declaration of independence of the People's Republic of South Yemen, which broke out on October 14, 1963, when the NLF threw grenades at British officials gathered at the Aden airport. A state of emergency was subsequently declared in Aden and the Protectorate of Aden, a British Crown Colony. The state of emergency escalated in 1967, hastening the end of the British colonial rule of Aden that began in 1839. from January 19 to 20, 1967, the NLF sparked street riots in Aden. After the Aden police lost control, the British National Army was dispatched to quell the riots; once the NLF riots were suppressed, pro-FLOSY mobs took to the streets. Fighting between British troops and pro-guerrilla rioters continued until February. British troops fired about 40 times, and about 60 grenade and gunfire attacks against British troops broke out. On November 30, 1967, the South Yemeni state, consisting of Aden and the former protectorate of South Arabia, became independent.