What was the outcome of the gallipoli campaign?

The Gallipoli Campaign was fought on the Turkish peninsula of Gallipoli from 1915 to 1916, during World War I.  

The campaign began in February 1915 with a massive bombardment from British and French warships against the Ottoman forts that defended the strait, and which failed mainly due to the presence of mines in the sea, placed by the Turkish military. This failure promoted the need for a combined operation between commanders and governments, in the form of landing, between British and French in order to conquer the Ottoman capital of Constantinople (present-day Istanbul). The control of the straits would allow France and the United Kingdom to revitalize the Russian Empire and enclose the Central Powers. The Russians urgently needed weaponry to confront the Central Powers that bounded it: the German Empire, the Austro-Hungarian Empire and the Ottoman Empire.

This idea, defended above all by Winston Churchill, would begin with the landing near Gallipoli, but the allies failed to penetrate the Ottoman territory by surprise and failed in the successive offensives which lasted until January 1916, with a result of about 250,000 casualties for each side.