With the new Mesopotamian government in place, they had far larger plans than just the fertile crescent. So, they began plotting to expand further into more territories in the region, with their numerous concentrated bases around their protectorates of Riyadh and Yemen, they found it easy to begin plotting their first expansion into them. Mesopotamian forces stationed across Riyadh and Yemen would receive orders from the generals, take over Yemen and Riyadh without a fight. The Yemeni Island (For some reason, scratch identifies it as a bad word, so I can't say it) would be occupied within 5 hours completely, and Aden and the coastline in about a day. In Riyadh, forces took up to 3 hours to fully occupy the city, and urged forces in the region to cooperate with their takeover, and to not resist. The governments of Yemen and Riyadh, under pressure from the Mesopotamian government who held numerous bases in their nations, would end up accepting their takeover, and while some leaders fled the scene, others remained and embraced the new nation. The new Umayyad Caliphate is formed.
Beginning of a new Caliphate :) Also, new name for the nation is Arabia The Japanese borders are hideous