World War I: Russia and the Central Powers sign an armistice at Brest-Litovsk, and peace talks leading to the Treaty of Brest-Litovsk begin.

World War I or the First World War, also known as the Great War, was a global conflict between two coalitions: the Allies and the Central Powers. Main areas of conflict included Europe and the Middle East, as well as parts of Africa and the Asia-Pacific. There were important developments in weaponry including tanks, aircraft, artillery, machine guns, and chemical weapons. One of the deadliest conflicts in history, it resulted in an estimated 30 million military casualties, plus another 8 million civilian deaths from war-related causes and genocide. The movement of large numbers of people was a major factor in the deadly Spanish flu pandemic.

Brest, formerly Brest-Litovsk and Brest-on-the-Bug, is a city in south-western Belarus at the border with Poland opposite the Polish town of Terespol, where the Bug and Mukhavets rivers meet, making it a border town. It serves as the administrative center of Brest Region and Brest District, though it is administratively separated from the district. As of 2025, it has a population of 346,061.

The Treaty of Brest-Litovsk was a separate peace treaty signed on 3 March 1918 between Soviet Russia and the Central Powers, by which Russia withdrew from World War I. The treaty, which followed months of negotiations after the armistice on the Eastern Front in December 1917, was signed at Brest-Litovsk.