The English Expedition Plans Shift to the Italian War begins as a crusade against the Moors and turns, before the expedition can sail, into a projected alliance against France. The reversal makes Katherine of Aragon the channel through which her father’s changing policy reaches Henry VIII. It also sets the language of holy war against the practical calculations of diplomacy: English troops are already at Cádiz, yet the promised campaign for the Holy Land gives way to events in Italy.

The crusade planned

The proposal draws on a conviction Katherine has carried since childhood: that England should join her father in defending Christendom and extending the struggle against the Moors. She has understood the alliance not simply as a diplomatic arrangement but as a religious undertaking. England’s wealth, and especially its ships, would help Spain take war to the Moorish powers in Africa and the Ottoman Empire; victory, in this vision, would be followed by further advance toward India and the East. The campaign has no clear limit in her imagination: it is a cause meant to continue as far as the perceived threat reaches.

The immediate invitation arrives while Katherine is still in grief for her infant son. Her father’s coded letter announces that she is to lead a crusade in Africa and asks Henry to send his best knights and leaders. It presents the Moorish kingdoms as a danger to Christendom and Mediterranean shipping, and casts the proposed expedition as a joint undertaking by Christian kings. The scale of the language is striking beside Katherine’s private bereavement: the news is framed as a summons to public duty, even as she remains overwhelmed by the loss.

Katherine translates the letter and carries it to Henry after he has been playing tennis. She reports that her father invites English nobles and lords to raise regiments and join him against the Moors. Henry responds with immediate enthusiasm, seeing the invitation as an opportunity for Englishmen to distinguish themselves. Katherine, however, makes clear that he is not to go himself. England has no surviving son, and she will not let the king risk himself in the expedition. Her support for the campaign is therefore not an unqualified endorsement of Henry’s personal participation: she seeks English involvement while guarding the succession.

News from Italy

The projected crusade does not set sail. The English knights reach Cádiz, but Ferdinand of Aragon has not yet raised his own troops and is not ready to depart. Katherine translates the correspondence between her father and Henry, keeping the alliance in motion while the expedition waits. The delay leaves the plan vulnerable to a sudden change in the wider political situation.

That change arrives in another letter. Henry has received a report from an English merchant in Italy that he cannot understand; Katherine’s father supplies the explanation. The Pope has demanded that French armies leave Italy and has put papal troops into the field against them. King Louis XII of France, in turn, has declared that the Pope should no longer hold the papal office. The dispute is no longer a distant complication to the crusade: it threatens Rome and the authority of the papacy itself.

Ferdinand’s instruction is decisive. The crusade must be forgotten, and the alliance must instead come to the Pope’s aid. He will try to arrange a broader partnership with Maximilian I, Holy Roman Emperor, against France. The change is not described as the abandonment of war, but as a redirection of its object. The forces gathered for a campaign against the Moors are now to serve a struggle over Italy, Rome, and the Pope’s position.

Katherine as mediator

Henry reacts with outrage at the prospect of France taking Rome or installing a papal ally. He invokes the English army’s past strength and asks whether Louis expects another Agincourt. His response turns the new information into an English commitment: he does not want France to advance in Italy, and he is ready to support Ferdinand’s proposal.

Katherine asks whether she should tell her father that England will unite with him against France. Henry takes her hand, kisses it, and puts his arm around her waist; this time, she does not pull away. He proposes that they write together and sign the letter jointly, so Ferdinand will know that his Spanish daughter and English son stand together. Their shared signature gives the alliance a personal as well as diplomatic form, with Katherine positioned between the two rulers not as a passive recipient of messages but as the person who translates, interprets, and carries their agreement.

Her cooperation is accompanied by caution. As she and Henry go to her rooms, Katherine observes that her father never acts without planning far ahead and suspects that he will seek some benefit for his own kingdom from the new arrangement. Henry, by contrast, expresses confidence in both Katherine and Ferdinand, calling Ferdinand his only father now. The moment offers a picture of marital partnership—Henry trusts her judgment and invites her into the letter-writing—but also of its political terms: Katherine is expected to guard English interests while serving as her father’s intermediary.

A campaign that never sails

The redirection is the culmination of a crusade that never comes to pass. The English knights have reached Cádiz, but they do not sail for the Holy Land or meet the enemy the original appeal had invoked. The sequence turns the expedition’s grand religious language into a record of contingent diplomacy: a delay while Ferdinand gathers troops, followed by a new crisis that makes aid to the Pope more urgent than the planned African campaign.

The episode also complicates Katherine’s earlier certainty about the crusading cause. The initial plan belongs to a worldview in which war against the Moors appears to be a continuing Christian duty. Later, remembering the compassion of a Moorish physician, she can no longer dismiss Moorish people as mere barbarians or enemies. That later reassessment does not erase the fervor with which she once understood the crusade; it shows how the ideal of an unending holy war will become less secure as her experience widens. In the summer of 1511, however, the immediate change is strategic: the campaign is redirected toward Italy, and Katherine helps bind the new policy to an alliance her father and husband can jointly support.