Bayezid was now compelled by an outbreak in his recent acquisitions in Asia Minor, fomented by the Emir of Karamania, to suspend operations on his northern frontier in Europe and to transfer his army to Asia. He received at Brusa an envoy from his brother-in-law, Alaeddin of Karamania, suing for peace. Bayezid replied that the sword alone could determine the issue between them. He sent an army at once, under Timurtash, against the Karamanians. It encountered Alaeddin on the plain of Ak-Tchai. The Turkish army was completely successful. Alaeddin and his two sons were captured, and without waiting for authority from Bayezid, Timurtash had them hanged. When Bayezid heard of this treatment of his brother-in-law, he affected to be greatly distressed and incensed, but he soon consoled himself by a text from the Koran, “The death of a prince is less regrettable than the loss of a province,” and he gave practical application of the verse by orders to his army to occupy and annex the whole of Karamania. There was no resistance. Konia and other cities in the eastern part of the State were taken. In spite of this, however, Karamania was not at this time finally incorporated in the Ottoman Empire. After the invasion of Asia Minor by Timur it recovered its independence, and it was not till seventy years later that it was finally subjected and incorporated. About the same time, 1393-4, Bayezid made further important conquests in Asia Minor—namely, Samsun, Cæsarea, and Sivas, the last of the most important fortresses on the frontier of Armenia. These great successes both in Europe and Asia were followed by a period of repose, during which Bayezid gave himself up to a life of gross debauchery. He was recalled from this by threats of war on the part of Sigismund, King of Hungary, and he soon showed that he had lost none of his vigour and dash.