Artemesion, Salamis.
Pacific
Persian Gulf, although the actual war was fought mostly in Iraq and Saudi Arabia.
It was mainly fought on land but the battle did take place on some forms of water and was fought also on air. Some sea battles were when the soviets destroyed German supplies. With air it was fought when the USSR bombed German airfields and when the Germans try to bomb the city, there were few some air to air battles was only less than a hand fall.
I presume you mean the battle of Sharpsburg. The answer is Antietam. The Confederates generally named the battles they fought after the nearest town whereas the Federals usually named battles for the nearest body of water. There were many exceptions to this practice.
Although there were some US Civil War battles fought on the high seas, the CSC Alabama and the USS Kearsarge as one example; naval blockades and riverine warfare (Brown Water Navy) were the primary naval battles fought during the civil war.
Being Persia = Iran, it borders the Persian Gulf.
Salt water. The Persian gulf is one of the saltiest bodies of water on earth.
The only body of water that borders Iraq is the Persian Gulf.
Bahrain is an archipelago of islands completely surrounded by the Persian Gulf.
Surprisingly, the Persian Gulf War of 1990-1991, commonly called the Gulf War in the United States and the Second Gulf War in Arab Countries, was fought in the Persian Gulf, a body of water bordering the nations of Qatar, Bahrain, Saudi Arabia, Kuwait, Iraq, and Iran. The name of the Persian Gulf comes form Iran's name in antiquity: Persia.
An island is a piece of land entirely surrounded by water.
The persian gulf