Venice going to take them to Cairo, but the crusaders couldn't afford paying Venice for their service, and the Venetians demanded 85,000 silver marks, or the crusaders wouldn't be allowed to leave. Because they didn't meet the requirements, the Venetians asked for their help to capture a Byzantine port, Zara, as a form of payment the crusaders agreed and a large army of 15,000 thousand crusaders and several thousand Venetians sailed to the port. Easily capturing it, they marched to the Byzantine capital of Constantinople and sacked Constantinople.