Constantine IV inherits his father's throne together with his ceaseless war with Muʿāwiyah. As the Caliph builds a fleet to threaten Constantinople the Emperor responds with the weapons at his disposal.
Source: https://shows.acast.com/thehistoryofbyzantium/episodes/episode-52-the-non-siege-of-constantinople
Episode 52 - The Non-Siege of Constantinople
The History of Byzantium
The History of Byzantium
A podcast telling the story of the Roman (Byzantine) Empire from 476 AD to 1453. www.thehistoryofbyzantium.com