1.Overview of the World WarⅠ 一戰概述
World War l（August 1914-November 1918）broke out in Europe but spread to the whole world.At that time most of the countries in world were involved in the war.
War fought mainly between the Triple Alliance and Triple Entente.German Empire and Austria-Hungary formed the Triple Alliance,while the United Kingdom,France,ltaly,the Russian Empire and Serbia formed the Triple Entente.From 1914 to 1918，many countries in Asia,Europe and America have joined the Allies.It was noteworthy that although the ltaly was Entente,but later the United Kingdom,France and Russia signed a secret treaty with ltaly,promised to give some of the land to ltaly.As a result,ltaly joined the Allies against the Entente.
The fuse of war was Sarajevo event in June 1914.lt divided into eastern front（Russia\\u0027s war Germany and Austria），Western line（Britain and France over war against Germany）and Southern line（also known as the Balkan front,Serbia Austria-Hungary lmperial combat）.The mostfiercest battle was the west line.The famous battles in western line were Marne Verdan and the Somme.
This war was one of the most damaging wars in the history of Europe.About 65，000，000 people was involved，10，000，000 people lost their lives,and 20，000，000 people were injured.
第一次世界大戰（1914年8月～1918年11月）是一場主要發生在歐洲但波及到全世界的世界大戰。當時世界上大多數國家都卷入了這場戰爭。
戰爭過程主要是同盟國和協約國之間的戰鬥。德意誌帝國和奧匈帝國是同盟國，英國、法國、意大利、俄羅斯帝國和塞爾維亞是協約國。在1914年至1918年期間，很多在亞洲、歐洲和美洲的國家都加入了協約國。值得注意的是意大利雖是同盟國，但是後來英國、法國及俄國與意大利簽訂密約，承諾給予意大利某些土地，結果意大利加入了協約國對抗同盟國。
戰爭的導火索是1914年6月的薩拉熱窩事件，戰線主要分為東線（俄國對德奧作戰），西線（英法比對德作戰）和南線（又稱巴爾幹戰線，塞爾維亞對奧匈帝國作戰）。其中西線最慘烈，著名的戰役有馬恩河戰役、凡爾登戰役和索姆河戰役。
這場戰爭是曆史上破壞性最強的戰爭之一。大約有6，500萬人參戰，1，000萬人失去了生命，2，000萬人受傷。
2.Meat-grinder—Verdun 絞肉機——凡爾登
The Battle of Verdun was one of the critical battles during the First World War on the Western Front.lt was fought between the German and French armies,from 21 February-18 December 1916，on hilly terrain north of the city of Verdun-sur-Meuse in north-eastern France.The Battle of Verdun ended in a French victory since the German High Command failed to achieve its two strategic objectives：the capture of the city of Verdun and a much highercasualty count inflicted on the French adversary.As a whole,the Battle of Verdun resulted in more than a quarter of a million battlefield deaths and at least half a million wounded.Verdun was one of the longest battle and the most devastating in the First World War and more generally in human history.