The Expedition to Tabouk, also known as the Expedition of Usra, was a military expedition, which, was initiated by Muhammad in October, AD 630, 8 AH. Muhammad led a force of as many as 30,000 north to Tabouk in present-day northwestern Saudi Arabia, and managed to capture Tabouk.
Following rumours of a Byzantine invasion, the Muslims as well as allies of Muhammad, received an urgent call to join the campaign. But the Arabs of the desert showed little interest. Many came up with excuses not to participate. Muhammad provided incentives to persuade the Arabs to join, and provided many with gifts.
Muhammad and his forces, marched northwards to Tabouk in October 630 (Rajab 9 AH). After arriving at Tabouk and camping there, Muhammad's army prepared to face the Byzantine invasion. Muhammad spent twenty days at Tabouk, scouting the area, making alliances with local chiefs, and with no sign of the Byzantine army, he decided to return to Medina.
Coordinates: 28°23′N 36°35′E / 28.383°N 36.583°E