William the Conqueror's Sons Divided England

His eldest son, Robert Curthose, inherited the Duchy of Normandy, while his second son, William Rufus, was granted England and its crown. The youngest, Henry Beauclerc, received a significant sum of money but no land.

William Rufus had already secured the English treasury and was crowned in September 1087. Many nobles, seeking a unified kingdom and lucrative rewards, backed Robert's uprising, with Bishop Odo leading the rebellion, which ultimately faltered due to Robert's financial constraints.

William II effectively suppressed the rebellion led by his brother Robert Curthose by strategically using bribes and promises to sway powerful English nobles to his side.

He besieged and captured his uncle, Bishop Odo, at Pevensey Castle, while opportune bad weather hindered Robert's naval invasion. The rebellion finally ended in July 1088 with the fall of Rochester Castle.

Henry swiftly occupied the royal treasury at Winchester and was subsequently crowned King Henry I at Westminster Abbey.

To secure legitimacy and appease his vassals, Henry I issued the 'Charter of Liberties,' addressing grievances such as over-taxation and corruption prevalent during William II’s reign.

This strategic marriage not only cemented the legitimacy of Henry’s reign but also provided him with an effective queen who served as a regent and a patron of the arts.

Upon returning from the First Crusade, Robert Curthose received an opportunity to launch a third rebellion when Bishop Flambard escaped from the Tower of London in February and joined his cause.

Robert claimed the English throne based on the short-lived 1087 agreement with William II, to which Henry responded by stripping Flambard of his lands and title in retaliation.

Robert Curthose landed his invasion force at Portsmouth but failed to capture the treasury. Henry I then intercepted Robert's army at Alton, leading to a diplomatic resolution rather than a direct confrontation.

The Treaty of Alton recognized Henry as the legitimate King of England and granted Robert an annual pension. The agreement also stipulated mutual military aid and established rules for succession, aiming to stabilize the fractured kingdom.

The King accused de Bellême of approximately 45 different offenses, and when he refused to answer these charges, Henry gathered his troops, besieged, and eventually captured de Bellême’s English castles, compelling him to accept exile to Normandy.

He provoked conflict by sending a friend with knights to Normandy and subsequently burned the town of Bayeux when it refused to surrender. However, the 1105 campaign stalled at Falaise due to various factors, including desertion and funding issues.

His offensive targeted the heavily fortified abbey of Saint-Pierre sur Dives, indicating his strategic intent to secure key positions in the duchy.

Henry I successfully took control of the abbey of Saint-Pierre sur Dives, capturing several of his brother Robert's leading supporters and forcing a reinforcement contingent from Falaise to withdraw.

Following these successes, Henry moved his siege operations to the castle of Tinchebray. Although initially lacking sufficient troops for a full blockade, he strategically surrounded the castle with the remainder of his forces.

The brothers attempted one final parlay, but Henry unequivocally refused to lift the siege, thereby forcing Robert into a decisive field engagement to resolve their long-standing conflict.

At the Battle of Tinchebray, Duke Robert deployed his forces with Norman heavy cavalry on the right and infantry on the left, while Henry I organized his army into three lines, dismounting most of his cavalry.

Count Elias of Maine led a hidden contingent of Breton cavalry, which remained concealed until a critical moment. The battle initially reached a stalemate, but the hidden reserve cavalry, emerging from their position, rode around the main engagement and flanked Robert's knights, turning the tide.

Robert de Bellême's abandonment of the battle further contributed to the total collapse of Robert Curthose's forces, securing a decisive victory for Henry I.

Following the decisive defeat at Tinchebray, Duke Robert Curthose and his remaining knights were captured, effectively ending his challenge to the English throne.

Henry I was welcomed in Rouen and formally recognized as the Duke of Normandy, successfully reuniting the lands of William the Conqueror 19 years after their initial division.

Robert Curthose was imprisoned indefinitely alongside other prominent nobles, while lesser prisoners from Tinchebray were released.

William Clito, Robert Curthose's three-year-old son, was placed under the guardianship of Norman baron Helias of Saint-Saens, a decision the narrator notes would later prove problematic for King Henry.

In contrast, Robert de Bellême reconciled with the King by relinquishing the ducal lands he had seized and subsequently joined the royal court, demonstrating Henry's pragmatic approach to managing former adversaries.

This reunification was the culmination of both diplomatic finesse and decisive military victories, most notably at Tinchebray. Despite this triumph, the video foreshadows that the stability of England and its unified territories remained fragile, hinting at future challenges.