World War I: Battle of Mărășești between the Romanian and German armies begins.

The Battle of Mărășești was the last major battle fought by the Central Powers against the Kingdom of Romania and Russia on the Romanian front during World War I. Romania was mostly occupied by the Central Powers, but the Battle of Mărășești kept the northern region of the country free from occupation.

Romania is a country located at the crossroads of Central, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to the east, and the Black Sea to the southeast. It has a mainly continental climate, and an area of 238,397 km² (92,046 sq mi) with a population of 19 million people. Romania is the twelfth-largest country in Europe and the sixth-most populous member state of the European Union. Europe's second-longest river, the Danube, empties into the Danube Delta in the southeast of the country. The Carpathian Mountains cross Romania from the north to the southwest and include Moldoveanu Peak, at an altitude of 2,544 m (8,346 ft). Bucharest is the country's largest urban area and financial centre. Other major urban areas include Cluj-Napoca, Timișoara, Iași, Constanța and Brașov.