The 1304 campaign began with a month's delay due to continuous disputes between the almogavars and their Alan allies, which caused 300 deaths in the forces of the latter. Finally, in early May, Roger de Flor began the campaign to raise the siege of Philadelphia with 6,000 almogavars and 1,000 Alans. Philadelphia at that time was suffering from a siege by Yakup bin Ali Şir, governor of the Germiyanids from the powerful emirate of Germiyan-oğhlu. After a few days, the almogavars arrived at the Byzantine city of Achyraus and descended by the valley of the River Kaikos until they arrived at the city of Germe (now known as Soma), a Byzantine fortification that had previously fallen to the Turks. The Turks who were there tried to flee as fast as possible, but their rearguard was attacked by the troops of Roger de Flor in what came to be called the Battle of Germe.