France
France had an interesting strategy during this war. Though they were not one of the initial countries in the war, they ended up as one of the most active during the war. France was a mostly defensive country due to the fact that Germany invaded their land. They had long term defensive agendas while also maintaining a day by day offensive attack against the Germans in the previously French owned land. Though they had an alliance with Germany before the war, they joined the Allied Powers instead. They were one of the Triple Entente powers, including Russia, France, and the UK. France was one of the countries with multiple armies. Each army had a specific function:
The first army had the objective of capturing Mulhouse and Sarreboug.
The second army had the objective of capturing Morhange.
The third army had the objective of defending the region around Metz.
The fourth army had the objective of holding in reserve around the forest of Argonne.
The fifth and final army had the objective of defending the Ardennes.
England
The United States
Though the U.S. joined the war late, they were still an important factor during this catastrophic first world war. Joining the war after the sinking of Lusitania and the Zimmerman Telegram, they immediatedly sided with their British allies. Bringing their AEF forces, they saved England from surrender as reinforcements. Not only did the number of soldiers for the Allied side increase, the moral of the soldiers for the Allied side improved drastically once the U.S. joined the war. Under the leadership of Woodrow Wilson, they contributed greatly to the Hundred Days' Offensive. Not all of their offensives were successful because they used flawed logic that the British used at the beginning of the war. At the end of the war, they didn't accept the Treaty of Versailles due to the U.S. Senate rejecting Wilson's proposed Fourteen Points. The American Expeditionary Forces weren't particularly good at fighting, but they increase in moral for the other Allied powers was the main contribution from America in the entire war.
Russia
Russia was one of the Allied Powers, though they left the war half way through the war. The reason they left the war was because of an uprising in their own country. The commmunist revolution in Russia provided a new leader for Russia. This new leader did not want to fight in the war. He gave peace talks with Germany and then left the war. When this happened, Germany gained a huge advantage because they no longer had to fight on multiple fronts. They could now focus on the Western Front, against Britain, France, the U.S., and Serbia. While they were still engaged in the war, they employed similar tactics as their fellow Allied Powers. The main reason they were so important to the Allied side was that they forced Germany to split their army into halves.
