Inns of Court Regiment called to fight in the wars of King John or against Robert the Bruce. One such defence of Medieval London was organised in 1381 against Wat Tyler, during the Peasants' Revolt (when the Chief Justice was killed). In 1467, the Chief Justice of the Exchequer, then Recorder of the city of London, was instrumental in defeating a Lancastrian attack on the city of London. Further accounts, such as Henry Machyn's diary (1554), tell of more localised defences when "On the xij day of Juin was a gret fray be-twyn the Lord Warden's servants of Kent and the Ines of Greys
Lord Mayor of London been mandatory for election to the Lord Mayoralty. Two Sheriffs are selected annually by Common Hall, which meets on Midsummer's Day for this purpose. By an ordinance of 1435, the Lord Mayor must be chosen from amongst the Aldermen of the City of London. Those on the electoral roll of each of the City's 25 Wards select one Alderman, who formerly held office for life or until resignation. Now each Alderman must submit for re-election at least once in every six years. The Lord Mayor is then sworn in November, on the day before the Lord Mayor's Show ("see below").