In the beginning of September of 1779, many Patriot troops and leaders planned an attack to take back Savannah from the British.
On the nights of September 11-12 many troops moved towards Savannah, they landed about 14 miles south of Savannah on the Vernon river. There they waited.
General Charles Henri d'Estaing
As the Patriot troops moved towards Savannah, the British were already prepared and sank ships in the Savannah river and had troops ready.
Many French and Patriot troops could not make landfall in many places because they received lots of British fire, once they were able to reach land, there were no tents and the rain made them even more miserable.
As about 1,600 Patriot and French troops move towards the edge of Savannah they are met with about 3,200 British troops, the British troops overpower the weaker and few in numbers, Patriots.
Around 1,050 Patriot and French troops were killed, as opposed to an estimated 17 British troops. This battle was the deadliest for Georgia during the revolutionary war and Savannah stayed in British control for the rest of the war until the US became its own country.