The Second Transjordan attack on Shunet Nimrin and Es Salt, officially known by the British as the Second action of Es Salt and by others as the Second Battle of the Jordan, was fought east of the Jordan River between 30 April and 4 May 1918, during the Sinai and Palestine Campaign of the First World War. The battle followed the failure of the First Transjordan attack on Amman fought at the beginning April. During this second attack across the Jordan River, fighting occurred in three main areas. The first area in the Jordan Valley between Jisr ed Damieh and Umm esh Shert the Egyptian Expeditionary Force (EEF) defended their advanced position against an attack by units of the Seventh Army based in the Nablus region of the Judean Hills. The second area on the eastern edge of the Jordan Valley where the Ottoman Army garrisons at Shunet Nimrin and El Haud, on the main road from Ghoraniyeh to Amman were attacked by the 60th (London) Division many of whom had participated in the First Transjordan attack. The third area of fighting occurred after Es Salt was captured by the light horse brigades to the east of the valley in the hills of Moab, when they were strongly counterattacked by Ottoman forces converging on the town from both Amman and Nablus. The strength of these Ottoman counterattacks forced the EEF mounted and infantry forces to withdraw back to the Jordan Valley where they continued the Occupation of the Jordan Valley during the summer until mid September when the Battle of Megiddo began.

The Egyptian Expeditionary Force (EEF) was a British Empire military formation, formed on 10 March 1916 under the command of General Archibald Murray from the Mediterranean Expeditionary Force and the Force in Egypt (1914–15), at the beginning of the Sinai and Palestine Campaign of the First World War.