The Sixth Crusade started in 1228 as an attempt to regain Jerusalem. It began seven years after the failure of the Fifth Crusade. It involved very little actual fighting, and some sources do not number it as a crusade; to them the "Sixth Crusade" is Louis IX's attempt on Damietta, two decades later.
Frederick II, Holy Roman Emperor, had involved himself broadly in the Fifth Crusade, sending troops from Germany, but he failed to accompany the army...
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The Sixth Crusade started in 1228 as an attempt to regain Jerusalem. It began seven years after the failure of the Fifth Crusade. It involved very little actual fighting, and some sources do not number it as a crusade; to them the "Sixth Crusade" is Louis IX's attempt on Damietta, two decades later.
Frederick II, Holy Roman Emperor, had involved himself broadly in the Fifth Crusade, sending troops from Germany, but he failed to accompany the army directly, despite the encouragement of Honorius III and later Gregory IX, as he needed to consolidate his position in Germany and Italy before embarking on a crusade. However, Frederick again promised to go on a crusade after his coronation as emperor in 1220 by Pope Honorius III.
In 1225 Frederick married Yolande of Jerusalem (also known as Isabella), daughter of John of Brienne, nominal ruler of the Kingdom of Jerusalem, and Maria of Montferrat. Frederick now had a claim to the truncated kingdom, and reason to attempt to restore it. In 1227...
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