The
Italian War of 1542-1546 arose from a dispute between
Holy Roman Emperor Charles V and
Francis I of France, which had not been settled by the
Italian War of 1535-1538. This led to war between France, backed by the
Ottoman Empire and
Jülich-Cleves-Berg, and the
Holy Roman Empire, backed by the
Kingdom of England, Spain,
Saxony, and
Brandenburg. After two years of fighting Charles V, and
Henry VIII invaded France. In September 1544, English forces captured
Boulogne. France failed to re-capture the city by force. Peace talks between England and France were unsuccessful, partly because Henry VIII refused to return Boulogne. As a result, Francis I decided to invade England, hoping that Henry VIII would return Boulogne in return for his leaving England. Thirty thousand French troops and a fleet of some 400 vessels were assembled, and sailed from
Le Havre on 16 July. On 18 July, French and English ships engaged off the English coast, marking the beginning of the
Battle of the Solent. The outnumbered English ships withdrew, French troops landed on 21 July. During the
Hundred Years War, society had become militarised: male adults were obliged to fight if needed, and they received regular military training. The Captain of the Isle, Sir
Richard Worsley of
Appuldurcombe House, was considered a "capable and energetic commander". He was assisted by Sir
Edward Bellingham, an officer in the regular army, and a headquarters staff. The French plan at Bonchurch may have been to burn
Wroxall and
Appuldurcombe, capture and consolidate a position on the heights of
St. Boniface Down, and then link up with another French landing near
Sandown. The area around Bonchurch was important because nearby
Dunnose Point offered safe anchorage, and had a fresh water source. ==Prelude==