Well I’m not going to write an entire essay for you, but here are some points that might help. I would encourage you to write about how you would join the war.
Consider that those who don’t join the war will be looked upon unfavourably by most, especially allies they swore to help. Essentially, you would be treated poorly at post-war negotiations.
Also consider the nationalist fervour present among the populous in most European states. People were rather excited for war in many cases, with many believing the war would be over by the Christmas of 1914. Not many knew the true horror of what would transpire during the war, and those who did didn’t make it known to the civilian population whose support they relied upon. Finally, bring up how Belgium declared neutrality but was still invaded by the German army.
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution<span> for the United States of America.</span>
Les Nabis.
Deriving their name from the Hebrew word for "prophets," the Nabis were founded by Paul Serusier, and were active in the late 1800s into the first decade of the 20th century. A number of members of the group were of Jewish background, so that's part of the explanation perhaps for the "Nabis" name for the movement. There was a desire to see art as a medium for revealing deeper truths. Their motto was expressed like this: "S<span>ounds, colors, and words have a miraculously expressive power beyond all representation and even beyond the literal meaning of the words."</span>