Robert Lundy, Governor of Derry-Londonderry, advises surrender at the approach of James’s army but is overruled and allowed to escape. The city holds out under siege for 105 days and is relieved on this date

history
Derry-Londonderry Relived of Siege
July 31, 1689

Derry-Londonderry relived of siege
July 31, 1689