How did the 1958 Iraqi coup affect Jordan’s federal union with Iraq?

The federal union between Jordan and Iraq, which had been established earlier in 1958 by King Hussein and his cousin, King Faisal II, effectively ended following the military coup in Iraq on July 14, 1958. During this coup, King Faisal II and members of his royal family were killed by revolutionary forces led by Iraqi army officer 'Abd al-Karīm al-Qāsim.12

The collapse of the Iraqi monarchy and the subsequent rise of the republican regime under Qāsim brought the short-lived Hashemite federation to an abrupt conclusion. Following the coup, King Hussein, fearing that his own regime was under immediate threat, sought and received military and economic assistance from Great Britain and the United States to secure his throne.12