Battle of the Marne
Date: September 6th - 12th, 1914
Info: The Battle of the Marne was a WW1 Battle fought against German militia in the West. The Allies were victorious. (I assume you mean the 1st and not the 2nd.)
Gallipoli (Also known as The Dardanelles Campaign)
Date: February 17th, 1915 - January 9th, 1916
Info: Another WW1 battle, this one was fought on the Gallipoli Peninsula. Britain and Frace were trying to gain an advantage over the Ottoman Empire by taking the supply routes to Russia located there. The Ottomans were victorious.
Battle of Jutland
Date: May 31st, 1916 - June 1st, 1916
Info: A WW1 Naval battle between Britain's fleet and Germany's fleet. Germany attempted to trap part of the grand fleet. Both sides claimed victory - Britain lost about 14 ships and there were many casualties, but they did succeed in containing the German fleet.
Battle of Verdun
Date: February 21st, 1916 - December 18th, 1916
Info: The longest WW1 battle fought on the Western Front, was between the German and the French. This was one of the most costly, if not the most costly, in the war. there were about 377,231 French and 337,000 German casualties, and the people living in the area were also affected greatly.
I can't answer any more at the moment, but I hope these help a bit :) The research isn't that difficult, just google the name, and look at the dates & info. Good luck!
