The second big factor in WWI was the arms race between Brittan and Germany. This was a race to see who could have the most modernized guns, but also who could have the largest navy. The seas took a major roll in WW1 because once you had control over the seas you had control over trade and the shipment of supplies. Having control over the seas was a very powerful position to hold because once the war supplies are cut off any battle will come to a halt very shortly. This is why the counties were in such a rush to gain a huge navy. The other advantage of a country having a large navy is they can protect their water front form getting an attack. One of the modernizations in this era was submarines. This was a huge advancement because it made it much easier to sink bigger ships with bigger guns. Submarines could sneak under blockades and ger very close to shore without anyone noticing.
The last part that made WWI so unique was trench warfare. This was possibly the most ineffective and deadly way of battle in history. Armies would set up trenches and stay in them for weeks at a time and just shoot at the enemy in another trench all day. Trenches were about 500 feet apart and the space in the middle was called no mans land. It was called this because if you even poked your head out of the trench for a second the chances of living were very low. In many cases opposing sides would have automatic machine guns just going along the border of the enemies trench. When it was time to invade the other trench the soldiers would jump out and run to the other trench. This was not an effective way of gain land at all, as seen in the battle of the Somme hundreds of thousands of people can die in just one day of trench war. Trench warfare was overall a very deadly and ineffective way of fighting. Many people were killed a day when on average only a half mile was gained.
WWI was very famous for many new inventions including, submarines and planes. Trench warfare also played a huge part in this war and after the war was almost never seen again, it was proved extremely deadly and ineffective. In all WWI brought new ways of fighting and it was the first time the whole word was involved in a war at the same time. This is why so many things were invented because all of the counties got together to fight and learned about different modernizations. This is why many call it the Great War.