Otto I the Great vs Umar II

Otto married Adelaide, the widowed queen of Italy, after intervening in Italian politics. This marriage gave him control over the Kingdom of Italy and strengthened his claim to imperial authority.

Otto led a German army to defeat the Magyar (Hungarian) forces at the Lechfeld near Augsburg. This victory ended Magyar raids into Western Europe and secured Otto's reputation as a defender of Christendom.

Pope John XII crowned Otto I as Holy Roman Emperor in Rome, reviving the imperial title in the West. This event established the Holy Roman Empire as a major political entity and linked German kingship with papal authority.

Umar II became the Umayyad caliph after the death of Sulayman ibn Abd al-Malik. He is often considered the fifth 'Rashidun' (rightly guided) caliph due to his piety and reforms.

Umar II ordered the withdrawal of Umayyad forces from the prolonged siege of Constantinople, which had failed to capture the city. This ended a major military campaign and saved resources.

Umar II implemented reforms that equalized tax treatment between Arab Muslims and non-Arab converts (mawali), abolished discriminatory taxes, and ensured fairer administration of justice. These reforms reduced social tensions.

Umar II died after a reign of only three years, possibly poisoned. His short tenure was marked by significant reforms, and he was later remembered as a model of Islamic piety and justice.