The Hashemite Arab Kingdom is a state in Northern Arabia & the Levant, ruled by the descendants of Hussein ibn Ali, the Sharif and Emir of Mecca, who allied with the British & the Jewish Zionists during World War One against the Ottoman Turks and the Germans.
The Kingdom was founded after the Hashemites defeated their rivals, the Saudi Sultans of Nejd.
The country borders Israel and Lebanon to the West, Syria to the North, Iraq to the East & Saudi Arabia to the South.
The country's main allies are the United Kingdom &, the State of Israel, with which it shares joint sovereignty over the West Bank (Judea & Samaria) and East Jerusalem.
It's real world equivalents are Jordan, the West Bank, southern Syria, and the Hejaz region of Saudi Arabia.