the main nations in the triple aliance were germany italy and austro hungary now ano that they became aliies because germany felt that the triple entrent was surounding it other nations in the triple aliance were burgaia and the ottomon empire not sure why the helped out the main nations in the triple entrent were france great brittain and russia this was joined because france did not want to be beatin and humiliate by germany again over nations in the triple entrent were Albania Andorra Democratic Republic of Armenia Belgium Bolivia Brazil British Empire[1] Australia Canada Indian Empire (Now Bangladesh, India and Pakistan) Newfoundland New Zealand Union of South Africa United Kingdom of Great Britain and Ireland British crown colonies Republic of China Costa Rica Czechoslovak Legions Cuba Ecuador France Kingdom of Greece Guatemala Haiti Honduras Kingdom of Italy Empire of Japan Liberia Kingdom of Montenegro Nicaragua Panama Peru Portugal Kingdom of Romania Russian Empire San Marino Kingdom of Serbia Siam (now Thailand) Uruguay United States of America again not sure why all these nations joined in ant the nutrel countrys were Afghanistan - Did not support or oppose any nation. Argentina Colombia Denmark - Traded with both sides. El Salvador Ethiopia Luxembourg - Never declared war on the Central Powers despite being invaded and occupied by Germany. Mexico - Declined an alliance with Germany (see Zimmermann Telegram). Netherlands - An Ally of the UK by treaty. Traded with both sides. Norway - Gave naval assistance to the UK. Paraguay Persia - Occupied by British and Russian troops. Spain - Also treaty bound ally to the UK. Sweden - Financially supported Germany. Switzerland - Switzerland did declare a "state of siege". Tibet Venezuela - Supplied the Allies with oil.