In 1964 the Royal Marines celebrated the Tercentenary of the Formation of the Admiral's Regiment in 1664. The occasion was observed by serving and past members of the Corps all over the world. In London 41 Commando provided the major portion of the Review unit, augmented by officers and men from other- units, ships and the Royal Marine Forces Volunteer Reserve. This unit, with in addition the Colours of Royal Marines Barracks Eastney and those of 40 and 45 Commandos, was therefore representative of the whole Corps. On 10th June, the birthday of the Captain General. HRH Prince Philip took the salute on Horse Guards when the Massed Bands Beat Retreat. On 22nd July, the Lord Mayor of London inspected the Review unit on the Artillery Ground in the City, where the first recruits were enrolled in 1664. Afterwards the Lord Mayor and Corporation held a Reception for all ranks in the Guildhall. On 23rd July, in the grounds of Buckingham Palace, Her Majesty The Queen reviewed the unit, which paraded in blue uniform, Lovat dress and combat dress, and with some of the weapons and equipment in current use in the Corps. Also on parade was a contingent of the Royal Marines Association. On completion of the parade, and before the march past, Her Majesty was presented with a Corps brooch and His Royal Highness, the Duke of Edinburgh, with a pair of cuff links. In the evening Her Majesty dined with nearly 300 serving and retired officers in the Painted Hall at the Royal Naval College, Greenwich. It was on that occasion, at which the Captain General took the Chair as President, that Her Majesty expressed a wish that henceforth the Royal Marines should drink the Loyal Toast seated in all their messes ashore and afloat. On 24th July the Captain General read the lesson at a Service of Thanksgiving at St. Paul's Cathedral at which the Bishop of London preached the sermon. The service was also attended by the Lord Mayor and the Sheriffs of the City of London. In the evening His Royal Highness was present at the Royal Marines night at the Royal Tournament and then went on to a Reunion for serving and retired members of the Corps, which was held in the Lyceum Ballroom off the Strand. On 30th July the Captain General attended a Senior NCOs Banquet at the Guildhall, Portsmouth.