Robert Bruce whom genealogists name "Robert Bruce IV" (c 1250 - c 1304), 6th Lord of Annandale, Earl of Carrick jure uxoris was a feudal lord in Scotland and Northern England during prelude stages of Wars of Scottish Independence. He descended from royal lineage that would give his family a claim to the Crown of Scotland.

He was the son and heir of Robert Bruce, 5th Lord of Annandale, who then in 1290 claimed the succession to the Throne of Scotland, being one of the two main competitors to rival it. (In 1306, after his death, his eldest son Robert the Bruce eventually succeeded in becoming the king.)

Legends tell that Robert Bruce, heir to Lord of Annandale, was a handsome young man when participating in Eighth Crusade. Adam de Kilconcath, one of his companion-in-arms, fell in 1270 in Holy Land, and Robert obliged to travel to tell the sad news to Adam's widow Marjorie of Carrick (1256-1292). Story continues reporting that Marjorie was so taken with the messenger that she had him held captive till he agreed to marry her in 1271.

His wife was by all accounts a formidable woman. Marjorie was the daughter of Neil, 2nd Earl of Carrick, and his heiress. Carrick was a Gaelic Earldom in Southern Scotland. Its territories contained much of today Ayrshire and Dumfriesshire. The couple held at least Turnberry Castle and Lochmaben. Marriage with Marjorie made Robert the Earl, as was the custom of that time.
Their children were:
1. Robert the Bruce
2. Edward Bruce
3. Thomas Bruce, executed 1307
4. Alexander Bruce, executed 1307
5. Nigel Bruce (Neil), executed 1306
6. Christina Bruce (Christian), married Gartnait, 7th Earl of Mar, mother of Donald, Earl of Mar
7. Mary Bruce, married (1) Neil Campbell; (2) Alexander Fraser
8. Isobel Bruce (Isabel), married King Eric II of Norway
9. Matilda Bruce, married Hugh de Ross, 4th Earl of Ross

Countess Marjorie died in 1292, and on the day of his wife's death Robert transferred Carrick to their eldest son, the future Robert I of Scotland thus making the son the Earl of Carrick.

Undoubtedly the biggest event of his life was the 'Great Cause' that was concluded in 1292. It gave the Crown of Scotland to his family' great rival, John Balliol, instead of his father. Queen Margaret of Scotland had died on the Orkney Islands around September 26, 1290. With her death, the main line of the House of Dunkeld came to an end and thirteen competitors claimed their rights to the Scottish crown. The two main competitors were Robert Bruce, 5th Lord of Annandale (Robert's own father) and John Balliol, Lord of Galloway. Fearing civil war between the Bruce and Balliol families and their supporters, the Guardians of Scotland asked the kingdom's southern neighbor, Edward I of England to arbitrate among the claimants in order to avoid civil war. Edward I saw this as the opportunity he had long been waiting for to conquer Scotland as he had conquered Wales and rule over all the British Isles. Arbitration processed slowly. After initial solutions which left two contenders, on August 3, 1391 Edward asked both Balliol and Bruce to choose forty arbiters while he himself chose twenty-four, to decide the case. There was then an adjournment until June 1292. Upon reconvening, the 104 arbiters wouldn't make a firm decision on the claimants. There was another recess until October 10, 1292, and at this time Edward got the arbiters to agree that as Lord Paramount of Scotland, he had the right to grant the kingship of Scotland as he would an earldom or barony. He chose Balliol on November 17, 1292 and on November 30, JOhn Balliol was crowned as King of Scots at Scone Abbey. On December 26, at Newcastle upon Tyne, King John swore homage to Edward I for the kingdom of Scotland. Edward soon made it clear that he regarded the country as his vassal state. The Bruce family thus lost what they regarded as their rightful place on the Scottish throne.

Soon afterwards, his father, Robert Bruce, 5th Lord of Annandale - the unsuccessful claimant - resigned his lordship to him. And also his claim to crown, in order to prevent it from extinguishing.

Both Robert and his son the new Earl of Carrick sided with Edward I against Balliol. In April 1294, Robert's son had permission to visit Ireland for a year and a half and, as a further mark of Edward's favour, he received a respite for all the debts owed by him to the English Exchequer. In 1295, his son and heir married his first wife, Isabella of Mar, the daughter of Donald, 6th Earl of Mar. Isabella died a year later bearing child, Marjorie Bruce, Robert's granddaughter.

It was not until 1295 that Edward I was even aware of the secret Franco-Scottish negotiations. In early October, Edward began to strengthen his northern defences against a possible invasion by a revitalised Scottish army. It was also at this point that Robert Bruce himself was appointed governor of Carlisle Castle. Edward also ordered John Balliol to relinquish control of the castles and burghs of Berwick, Jedburgh and Roxburgh. In December, more than two hundred of Edward's tenants in Newcastle were summoned to form a militia by March 1296 and in February, a fleet of ships sailed north to rendezvous with his land forces in Newcastle.

The build up of English forces south of the Anglo-Scottish border did not go undetected and in response, King John Balliol summoned all able-bodied Scotsmen to bear arms and converge near the border at Caddonlee by March 11.

Balliol seized Robert's Annandale estate and reassigned it to John 'The Red' Comyn, Earl of Buchan. Several of the Scottish nobles chose to ignore the summons, including his son Robert Bruce, Earl of Carrick.

The beginning of the Wars of Independence: In August 1296 Robert and his son swore fealty to Edward I at Berwick, but in breach of this oath, which had been renewed at Carlisle, the younger Robert joined in the Scottish revolt against Edward in the following year.

Shortly after the Battle of Stirling Bridge, Annandale was wasted as retaliation to younger Bruce's actions. Yet, when Edward returned to England after his victory at the Battle of Falkirk, Annandale and Carrick were excepted from the lordships and lands which he assigned to his followers, the father having not opposed Edward and the son being treated as a waverer whose allegiance might still be retained.

In July, Edward I launched his sixth campaign into Scotland. Though Edward captured Bothwell and Turnberry Castle, Edward did little to damage the Scots’ fighting ability and, in January 1302 agreed to a nine-month truce.

Robert at that time was old and ill, and there are reports that he wished his son to seek peace with Edward, who, he was convinced, would be victorious over the Scots. The elder Bruce would have seen that, if the rebellion failed and his son were against Edward, the son would lose everything, titles, lands, and probably his life.

It was around this time that Robert's son submitted to Edward I, along with other nobles, even though he had been on the side of the patriots until now. There are many reasons which may have prompted his turning, not the least of which was that the Bruce family may have found it loathsome to continue sacrificing his followers, family and inheritance for John Balliol. There were rumours that Balliol would return with a French army and regain the Scottish throne. Soulis supported the return of Balliol as did many other nobles, but the return of John as king would lead to the Bruces losing any chance of ever gaining the throne themselves.

When old, this Robert Bruce, 6th Lord of Annandale, suffered from a skin ailment, what some contemporary accounts mention as leprosy. Tendency to severe skin disease apparently was hereditary in the Bruce line, as a similar tale of illness is traditionally attached to late years of his son too.

He was portrayed by Ian Bannen in the 1995 film Braveheart.