Basiliscus, born in the year 500, rose to prominence as a politician and military leader in the Eastern Roman Empire. He served as magister militum per Thracias under Emperor Leo I, where he commanded an ill-fated military campaign against the Vandal Kingdom in 468. This campaign ended in disaster at the Battle of Cape Bon, leading to significant financial losses for the empire, estimated at one hundred thirty thousand pounds of gold, which plunged the Eastern Empire into a prolonged state of near bankruptcy.
Following the death of Emperor Leo in 474, Basiliscus found himself embroiled in a power struggle. His sister, Empress Verina, conspired to place her lover, Patricius, on the throne. However, Basiliscus managed to sway the Eastern Roman Senate to acclaim him as emperor instead, despite the initial intentions of Verina. His reign began on 9 January 475, but it was marked by immediate challenges, including alienation from his allies and subjects.
To bolster his support, Basiliscus adopted policies favoring the miaphysites, reinstating key religious figures and promoting an encyclical that condemned the Council of Chalcedon. However, his efforts were met with fierce opposition from the Patriarch of Constantinople, Acacius, and other influential figures, leading to widespread discontent among the populace.
As political tensions escalated, Zeno, the rightful emperor, returned to reclaim his throne with the support of former allies. Basiliscus's position weakened further when key supporters defected, culminating in Zeno's unopposed entry into Constantinople in August 476. In the face of impending defeat, Basiliscus and his family sought refuge in a church, but ultimately faced exile to Limnae in Cappadocia, where they met a tragic end.