The Ottomans at this point made a change in tactics, opting to pit Ethiopian rulers against each other in order to achieve their conquest, rather than invading unilaterally. They had employed this same tactic earlier in the Balkans: absorbing local entities through local rulers due to a shortage of manpower (here because of its peripheral nature and problems with the Safavids and in the Mediterranean) rather than direct conquest.[5] The Bahr negash Yeshaq had bad relations with Emperor Menas, who had just assumed the throne, so in 1561 he revolted against Menas, but the following year he was defeated in battle. Yeshaq then fled to the Ottomans and promised to cede them Debarwa, Massawa, Arqiqo, and all the land in between in return for their help.