Map showing the territorial gains (darker shades) of Romania, Bulgaria, Serbia, Montenegro, and Greece, primarily at the expense of Turkey, agreed in the Treaty of Bucharest following the Second Balkan War. Despite its gains, Bulgaria also lost territory to both Romania and Turkey.
The Balkan States According to the Treaty of Bucharest; Acquisitions of New Territory shown by darker shades
"On July 24, 1917, at dawn, after a strong artillery preparation which scattered the enemy positions, the divisions within the first echelon of the Romanian Second Army embarked upon the attack. The fighting was grim. In some places, the Romanian soldiers, piercing the enemy positions, attacked the enemy with the bayonet, thus compelling it to a hasty retreat. However, in other places the resistance put up by the German and Austro-Hungarian troops was extremely stubborn. The Romanians mounted the strongest attack for the liberation of the village of Mărăşti. . . . By the evening the Romanian troops had taken hold of the first position. The same day the Russian VIII Corps which attacked on the left of the Romanian Second Army scored a similar victory."
The battle of Mărăşti began on July 24, 1917 with an attack by the recovered and newly re-armed Romanian army. Romania entered the war on August 27, 1916, and was overrun by Central Power forces by the end of the year, driven out of Wallachia and Dobruja and back to Moldavia where the Russians held the Allied line. After rebuilding with support, training, and weapons from France, the Romanian army launched its offensive to retake the country's lost territory.
Romania in World War I, a Synopsis of Military History by Vasile Alexandrescu, pp. 48–49, copyright © 1985, publisher: Military Publishing House, publication date: 1985
1917-07-24, 1917, July,, Battle of Mărăşti, Mărăşti, Battle of Maraşti, Maraşti, Romania, Moldavia