 Complete the following phrase:  During the war, initially the Kingdom of Romania was neutral to the Central Powers, thus with Austria-Hungary. In August 1916 Romania entered the war on side of the Allies and attacked the Kingdom of Hungary, however it was pushed back to the frontier in October and by January 1917, two-thirds of Romania were occupied by the Central Powers. The Romanians were forced to retreat to the historical region of Moldavia, but were able to stave off complete collapse in 1917 by reorganizing their army and repulsing the Central Powers offensive at Mărășești and 