Practically all the ground lost was slowly regained by the French in the autumn.

The Russians had entered Persia in February, and April 17 had captured the important city of Trebizond in Armenia from the Turks.

But on April 29 General Townshend surrendered his entire British force to the Turks at Kut el Amara, after being besieged for 143 days and finally starved into submission.
Throughout the balance of the year the advantage was greatly on the side of the Germans, for the latter part of the year saw the beginning of the crushing of Roumania, which had entered the war August 27 on the side of the Allies.

Bucharest, the capital, fell to the Germans December 6; Dobrudja, January 2, and Focsani, January 8 of the ensuing year, 1917.
The crushing of Roumania was accomplished almost entirely by treachery.
The Germans knew the plans of all the principal fortifications; the strength and plans of the Roumanian forces, and every detail calculated to be of benefit.

The country had been honeycombed with their spies prior to and during the war, very much as Russia had been.