The two sides involved in World War I were the Allies and the Central Powers. Both sides had basically the same weapons, and once the war got into the Trench Warfare stage it was nearly impossible for either side to win.Trench warfare started in 1914, and continued until the end of the war.
The history of the United States Marine Corps (USMC) begins with the founding of the Continental Marines on 10 November 1775 to conduct ship-to-ship fighting, provide shipboard security and discipline enforcement, and assist in landing forces.
Before that, in 1664 and 1665, the British and the Dutch, to reinforce their naval wars, had organized Marines and trained and armed them to fight aboard and from ships. Even earlier, at the time of Christ, the Romans had specially trained shipboard infantry called soldiers of the sea..