He delivered the Roman hostages who were held in captivity in the town, recovered the standards lost at Caudium, and made 7000 of the enemy pass under the yoke.
In the struggles between John and his barons Lincoln in 1216 made peace with the king by surrendering hostages for the payment of a fine of 1000 marks, but after the landing of Louis the city was captured by Gilbert de Gant, then earl of Lincoln.
To soothe the populace and protect the frontier more was required than the resumption, as in all grave crises of the Revolution, of terrorist measures such as forced taxation or the law of hostages; the new Directory, Sieys presiding, saw that for the indispensable revision of the constitution a head and a sword were needed.
To enforce this claim he ravaged and plundered a large part of the country, took hostages from Niall Caille the over-king (833-845), drove out the comarba of St Patrick, or archbishop of Armagh, and for a whole year occupied his place as bishop. On his return he plundered the termon lands of Clonmacnoise " up to the church door," an exploit which was repeated the following year.
In his famous circuit of Ireland (941) he took all the provincial kings, as well as the king of Dublin, as hostages, and after keeping them for five months at Ailech he handed them over to the feeble titular ardri, showing that his loyalty was greater than his ambition.