The garrison of Gibraltar rebelled Change_of_leadership in 1410 against the Granadan ruler , Yusuf III , and declared Expressing_publicly allegiance to Abu Said Uthman III of Morocco .

A Granadan counter-offensive Attack in 1411 drove Bringing Abu Said back to Gibraltar , where he took refuge .

Eventually a Granadan sympathiser in the garrison helped Assistance the besiegers to gain entrance .

They stormed Attack the Moorish Castle , forcing Abu Said to surrender Surrendering , and restored Recovering Granadan control over Gibraltar .

Instead , the Granadan sultan gave Giving Abu Said an army and sent Sending him back to Morocco to launch an ultimately unsuccessful rebellion Change_of_leadership against Abu Said Uthman III .