German invasion of Belgium (1914)

Overview

The German invasion of Belgium began on 4 August 1914 during the first World War. On 24 July, the Belgian government had announced that if war came it would uphold its neutrality. The Belgian government mobilised its armed forces on 31 July and a state of heightened alert was proclaimed in Germany. On 2 August, the German government sent an ultimatum to Belgium, demanding passage through the country and German forces invaded Luxembourg. Two days later, the Belgian government refused the German demands and the British government guaranteed military support to Belgium. The German government declared war on Belgium on 4 August; German troops crossed the border and began the Battle of Liège.

Overview adapted from Wikipedia, licensed under CC BY-SA 4.0.

Significance

The German invasion of Belgium on 4 August 1914 was a pivotal opening act of World War I, directly triggering British entry into the conflict. Belgium had declared its intent to uphold neutrality on 24 July, and when the German ultimatum of 2 August demanding passage rights was rejected, Germany declared war and crossed the border, simultaneously launching the Battle of Liège. Britain's guarantee of military support to Belgium upon that refusal brought a major industrial and naval power into the war against Germany, fundamentally altering the strategic balance. The invasion also confirmed that the war would not be confined to the Franco-German frontier, forcing a multi-front coalition response from the outset. German forces numbered roughly 750,000 against a Belgian force of 220,000, with combined casualties of approximately 50,000 in the opening phase, signaling the scale of attritional warfare that would define the conflict.

Forces & casualties

Commanders (6)