In diplomatic history, a color book is an officially sanctioned collection of diplomatic correspondence and other documents published by a government for educational or political reasons, or to promote the government position on current or past events. The earliest were the British Blue Books, dating to the 17th century. In World War I, all the major powers had their own color book, such as the German White Book, the Austrian Red Book, Russian Orange Book, and more.

Germany entered into World War I on August 1, 1914, when it declared war on Russia. In accordance with its war plan, it ignored Russia and moved first against France–declaring war on August 3 and sending its main armies through Belgium to capture Paris from the north. The German invasion of Belgium caused Britain to declare war on Germany on August 4. Most of the main parties were now at war. In October 1914, Turkey joined the war on Germany's side, becoming part of the Central Powers. Italy, which was allied with Germany and Austria-Hungary before World War I, was neutral in 1914 before switching to the Allied side in May 1915.