 The modern historian Khalid Yahya Blankinship described the treaty of 689 as "an onerous and completely humiliating pact" and surmised that Abd al-Malik's ability to pay the annual tribute in addition to financing his own wartime army relied on treasury funds accrued during the campaigns of his Sufyanid predecessors and revenues from Egypt.In 689/90, Abd al-Malik used the respite from the truce to initiate a campaign against the Zubayrids of Iraq, but was forced to return to Damascus when al-Ashdaq and his loyalists abandoned the army's camp and seized control of the city.Al-Ashdaq viewed Abd al-Malik's accession as a violation of the caliphal succession agreement reached in Jabiya.