The Gallipoli peninsula is located in the south of Turkey. In 1915, the allied commanders decided to try to attack Germany by attacking her ally, Turkey. Allied soldiers, mainly from Australia and New Zealand, were sent to the Peninsula while British ships tried to force a way through the Dardanelles.
The entire mission was a failure. The allies lost more than 50,000 men but gained hardly any land. The map above, which can be clicked to enlarge, shows the front line. The blue line shows the allies position while the green shows the Turkish line.