Although Pulaski frequently suffered from malaria while stationed in Charleston, he remained in active service. At the beginning of September Lincoln prepared to launch an attempt to retake Savannah with French assistance. Pulaski was ordered to Augusta, where he was to join forces with General Lachlan McIntosh. Their combined forces were to serve as the forward elements of Lincoln's army. Pulaski captured a British outpost near Ogeechee River. His units then acted as an advance guard for the allied French units under Admiral Charles Hector, comte d'Estaing. He rendered great services during the siege of Savannah, and in the assault of October 9 commanded the whole cavalry, both French and American.