Northern front of the Battle of Transylvania

Northern front of the Battle of Transylvania
Part of the Battle of Transylvania of the Romanian Campaign of World War I
Romanian soldiers surprising the Austro-Hungarians at the Nagy-Gyimes railway station
Date 27 August–16 October 1916 Location Northeastern Transylvania, Austria-Hungary (today in Romania) Result Romanian tactical victory
Belligerents
Romania	Austria-Hungary  Germany Székely partisans
Commanders and leaders
Constantin Prezan Ion Antonescu	Arthur Arz von Straussenburg Curt von Morgen
Units involved
Romanian North Army	1st Army 7th Army (Battle of the Kelemen Mountains only)
Casualties and losses
Negligible overall Battle of the Kelemen Mountains: 136 killed 55 prisoners	First day of the Romanian offensive: 741 prisoners Final phase of the Romanian offensive: 1,753 prisoners 4 machine guns Battle of the Kelemen Mountains: 10 killed 63 wounded 44 prisoners 82 missing

On 27 August 1916, Romania entered World War I on the side of the Allies, three of its armies invading Transylvania. The 1st and 2nd Armies invaded the southern part, while the Romanian North Army invaded the northeastern part. Unlike the 1st and 2nd Armies – which had to contend with a German-led counter-offensive (First Battle of Petrozsény, Battle of Brassó) – the North Army faced primarily Austro-Hungarian forces, and as such its campaign hardly had any major battles. After conquering three Hungarian urban districts (including two county capitals), the undefeated North Army was ordered to withdraw due to events outside its control, after inflicting heavier losses than those it had incurred.