The rule of a regent or regents is called a regency. Afterwards he joined a coalition against Perdiccas, the royal regent over Philip III of Macedon. He also accused him of abusing his powers as regent and crown prince. Devonshire was a close friend of the Prince Regent. Philip waged war against Byzantion, leaving Alexander in charge as regent and heir apparent. She became the second Siamese queen regent in Thai history. The Dauphin responded by declaring himself regent for his father. A less pro-Ottoman regent, "Ras" Tafari Makonnen, was installed on the throne. They presented a manifesto addressed to the Queen Regent. Diana is unofficially pledged in marriage to Tiberius's regent, Caligula. Ernesto Benedettini became one of the two Joint Captains Regent of San Marino. Gandhiji also met with the Regent Maharani. Allied soldiers in London danced in a conga line on Regent Street. This was a humiliating offense for the man Otto had named his regent. She pledged to rule justly through her Regent, Tafari.