The 1917 Romanian Campaign consisted in three battles between late July and early September 1917, fought between Germany and Austria-Hungary on one side versus Romania and Russia on the other. Romania emerged from this campaign with a slight net territorial gain and won its most important battle during the First World War.

The Battle of Mărăști was one of the main battles to take place on Romanian soil in World War I. It was fought between 22 July and 1 August 1917, and was an offensive operation of the Romanian and Russian armies intended to encircle and destroy the German 9th Army. The operation was planned to occur in tandem with the Nămoloasa offensive; however, this operation was abandoned before it began.