In northern Italy, meanwhile, Catinat marched on Rivoli (with reinforcements from the Rhine and Catalan fronts), forcing the Duke of Savoy to abandon the siege and bombardment of Pinerolo (25 September - 1 October) before withdrawing to protect his rear. The resultant Battle of Marsaglia on 4 October 1693 ended in a resounding French victory. Turin now lay open to attack but further manpower and supply difficulties prevented Catinat from exploiting his gain, and all the French could get out of their victory was renewed breathing-space to restock what was left of Pinerolo. Elsewhere, Noailles secured the valuable seaport of Rosas in Catalonia on 9 June before withdrawing into Roussillon. When his opponent, Medina-Sidonia, abandoned plans to besiege Bellver, both sides entered winter quarters. Meanwhile, the French navy achieved victory in its final fleet action of the war. On 27 June Tourville's combined Brest and Toulon squadrons ambushed the Smyrna convoy (a fleet of between 200-400 Allied merchant vessels travelling under escort to the Mediterranean) as it rounded Cape St. Vincent. The Allies lost approximately 90 merchant ships with a value of some 30 million livres.