The Battle of Gallipoli took place between 25 April 1915 and 9 January 1916., in modern day Turkey.
The operation was launched by Britian and France in order to capture the Ottoman capital of Constantinople (Istanbul) and secure a sea route to Russia.
The operation was unsuccessful, with over half a million casaulties from both sides. It had a profound affect on all the countries involved.
It is widely consider the first major battle undertaken by Australian and New Zealand Army Corps (ANZAC), and is marked on 25 April by Anzac Day. Anzac Day remains the most significant commemeration of military casualties and veterans.
Every year on 25 April, many take the trip to Gallipoli in order to remember those who lost their life in this significant battle.