Barbarossa reluctantly co-operated with the French in an attack against nice during the shortlived Francoottoman alliance
more than 110 ottoman galleys carrying 30,000 troops led by grand admiral hayreddin Pasha sailed into the French port of marseilles on 21 July 1543 for the purpose of conducting a joint operation against their mutual enemy, holy roman emperor charles V.
to his disgust, the ottoman admiral found the French unwilling to embark on an attack directly against charles’s dominions in italy as previously discussed. instead, the French had decided to attack nice, which belonged to duke charles of savoy, one of charles’s allies. the ottoman admiral was furious as he believed the French were squandering a great opportunity by attacking such a minor objective.
the attack began a month later. turkish batteries blasted a breach in the outer walls of the town through which French troops poured. but the combined army failed to capture the citadel. When Francois de bourbon, count of enghien, learned that a relief army was on its way, he ordered a withdrawal. the French troops sacked the lower town, yet the ottomans were blamed for it.
Grand Admiral Hayreddin Pasha led an armada of 110 ships to Marseilles, only to learn that the French wanted to avoid attacking Habsburg lands