The longest and most vicious battles ever fought in the history of mankind took place during World War I, particularly those fought on the Western Front between the Allied forces and the Imperial German Army. In terms of the amount of men that took part in, the number of artillery pieces fielded, the number of howitzer shells fired, and the degree of innovation and lethality of the weapons used, WW1 battles were, indeed, also the most intense military engagements of the 20th century. Over 700 million artillery shells were fired during this 4-year-long armed conflict as tens of thousands of guns and howitzers of all calibers were employed. Approximately, 40 million soldiers fought on the Western, Eastern, and Italian Front battles, with over 10 million people killed, both military men and civilians. Yes, it is true that more than 50 million people were killed during World War II, but most of them were civilians that died during bombing raids and in concentration camps, while most of the casualties of the Great War were soldiers killed in action, mown down by machine gun fire or blasted away by artillery shells.
List of WW1 Battles According to Time Length and Intensity
1- Battle of Verdun (from February 21 to Decembre 18, 1916). Around 3 million men fought in the hell of Verdun and more than 6 million artillery shells were fired. Casualties: almost 1 million men.
2- Battle of the Somme (from July 1 to November 18, 1916). Approximately 2.9 million troops participated in this battle, which has the greatest number of attacks and counter-attacks.
3- Second Battle of the Aisne (from May 9 to October 26, 1917).
4- Third Battle of Ypres (from July to November, 1917).
5- Allied Hundred Days Offensive (from August 8 to November 11, 1918).
6- German Spring Offensive (from March 21 to July 19, 1918).
7- Battle of the Frontiers (from August to September, 1914).
8- Battle of Arras (from April to May, 1917)
9- Battle of Cambrai (from November 20 to December 8, 1917).
1- Battle of the Vistula River (From September 29 to October 31, 1914). This is the only Russian victory over the Germans in this conflict.
2- Battle of Galicia (August 23 to September 11, 1914). A military engagement between the Austrian-Hangarian Army and the Imperial Russian Army.
3- First Battle of the Masurian Lakes (September 7 – 14, 1914).
4- Battle of Tannenberg (August 26 – 30, 1914)
5- Gallipoli Campaign (April 1915 to January 1916). British and Australian forces unsuccessfully attacked the Turkish positions on the Gallipoli peninsula in the southeastern Europe.
5- Second Battle of the Masurian Lakes (February 7 – 22, 1915).
6- Operation Faustschlag (from February 18 to March 3, 1918). A successful German offensive against the Bolshevik Army. Last military engagement on the Eastern Front.
1- Battle of Caporetto (from October 24 to November 12, 1917).
2- Battle of Vittorio Veneto (from October 24 to November 3, 1918).
3- Sixth Battle of the Isonzo River (August 6 – 17, 1916).
4- First Battle of the Isonzo River (from June 23 to July 7, 1915).