Battle of the Falkland Islands with Admiral Graf Spee.
Second battle of the Marne
The battle of the Somme and The battle of Verdun
Basra
The Battle of The Somme
The Gallipoli Campaign .
there is none. the longest war in world war 1 is world war 1. it would have to be the longest battle. :)*
World War I
The BATTLE OF JUTLAND was the largest naval battle in World War I.
World War 2 Battle of Stalingrad Battle of Britain Battle of the Atlantic Battle for Midway Battle of Leningrad
The: battle of Somme battle of Kut
Battle of Antietam
the red barron