Veterans from the Second World War, and those who saw action in Korea, Aden, Borneo and later engagements joined serving soldiers on the parade ground at the historic barracks for the annual Minden Day celebrations, commemorating the Battle of Minden, in North Germany, in 1759, which took place during the Seven Years' War.
Some 41,000 British and German troops, under the command of Prince Ferdinand, lined up against 51,000 French and Saxons, led by Marshal the Marquis de Contades. Among the British forces was the 25th Foot, which was to become the King's Own Scottish Borderers.
After the battle ensued, the 25th Foot was one of six regiments awarded Minden as a battle honour.
Each year, on or about August 1, parades are held in memory of those who earned this battle honour and roses are presented, as those who fought in the battle plucked roses from the gardens of Minden as they went forward into action.
Numbers at this year's parade were swelled by a reunion of Borderers who took part in the Aden and Radfan operations in the early 1960s.
Aden had long been of interest to Britain, first as a link to India and then as a port for accessing Middle East oil supplies, especially after the Suez crisis in 1956.
The main body of the KOSB arrived in Aden Harbour in February 1962. The task of the battalion was mainly concerned with internal security, with a detached platoon stationed permanently at a hill station on the Yemeni border.
The battalion returned to Britain in January 1964, and by May that year, all members were looking forward to a quiet weekend to recover from six weeks intensive training which could see them flown to any part of the world.
However, commanders were told that elements of the battalion would be returning to Aden that evening and more than 500 were mobilised.
After a period of acclimatisation, the Borderers had moved up country to Radfan, where they took part in 25 engagements with rebel tribesmen, suffering just six wounded.
The battalion finally returned home in July, 1964.
Brigadier Andrew Jackson, president of the KOSB Association and representative colonel of The Royal Scots Borderers (1 Scots), 1st Battalion The Royal Regiment of Scotland, which was formed by the merger of The Royal Scots and The King's Own Scottish Borderers, in 2006, welcomed more than 250 veterans to the parade.
"I have never seen so many people on parade on this day. This day is all about reunion, banter and people, and the more people who come, the more successful it is, year after year."
Brig Jackson then read a short letter from Alistair Thorburn, who was commanding officer of the battalion during its two years in Aden.
Now aged 88, Mr Thorburn said he was disappointed not be able to join the reunion, but that it had been a great privilege to command the KOSB during that period.
One special guest who was present at the parade was Bill Speakman, who, as a private, was awarded the VC for his bravery in an action dubbed the Gunpowder Plot Battle in November 1951, during the Korean War.
On Sunday, November 4, 1951, the Chinese communists launched 6,000 men in an all-out attack on a two-hill ridgeline position on the 1st Commonwealth Division's front.
The 1st Battalion, KOSB, took the brunt of attack along a 3,000 yard front, but the Chinese action failed.
During the battle, Bill Speakman, with the aid of six men from his battalion, organised an attack that held the Chinese off.
Testimony from witnesses said Private Speakman was fighting on the ridge top, tossing grenades at the Chinese, as they climbed towards the KOSB's positions. When he ran out of grenades, he ran down to the ration pit, grabbed a new supply of grenades and returned to the ridgeline to resume his assault on the Chinese.
When a machine gun was knocked out and his company was in danger of being overrun by the Chinese, he organised his men to defend the weapon and prevent the Chinese turning it on the KOSB, giving his company time to withdraw to safety.
Mr Speakman has recently returned to the UK from his home in South Africa and said he was delighted to attend the parade.
"It has been a fantastic day and a wonderful turn out," he said.
Following Brig Jackson's address, the veterans joined their serving comrades in forming up on the barracks' parade ground before marching through the centre of town, where large crowds lined the route.
Then there were refreshments and plenty of time to catch up with old friends.