[1] The siege of Boulogne took place between 19 July and 14 September 1544, during the third invasion of France by King Henry VIII of England.

Henry awaited a large French invasion fleet which never came, and subsequently much of England's military resources during his and his son's reigns were diverted to the war in Scotland.

[4] The two Dukes quickly proceeded to disobey this order: leaving some 4,000 men to defend the captured city, they withdrew the rest of the English army to Calais.

[5] The English army, outnumbered, was now trapped in Calais; the Dauphin, left unopposed, concentrated his efforts on investing Boulogne.

The military engineer Richard Lee and Thomas Palmer, treasurer of Guînes, brought additional instructions directly from Henry VIII.

[8] The English possession of Boulogne was eventually compromised by the French construction of a fort at Marquise, north of the town, which could blockade supplies.

[10] The guns of Boulogne were listed in the inventory of English crown possessions taken after Henry VIII's death on 28 January 1547.

These included recently captured pieces and; 2 basilisks; 2 demi-cannon; 3 culverins; 2 demi-culverins; 3 sakers; 16 falcons; 94 arquebus a croc with wooden tails (muskets for fixed positions); and 21 iron guns.

[12] There was a truce between the French and English at Boulogne according to a treaty made between Edward VI of England and Francis I of France in March 1547.

The French claimed it was a new fortification in breach of truce under the Treaty of Camp, while the English maintained that it was merely a sea wall to protect the haven.

In the diplomacy, this dispute was connected with arguments over English and French intentions and intervention at St Andrews Castle in Scotland.

Some laughed at Châtillon, saying he had made his scaling ladders too short, although the action was well-conceived as the fort was crucial to the defence of the town.

Henry II determined to continue building the English star fort at Ambleteuse and the neighbouring work at Blackness.

[19] The Basilica of Notre-Dame de Boulogne, destroyed or badly damaged by the English, was to be rebuilt, Henry II gave the church a silver statue of Our Lady, and other nobles subscribed money.