Belgium

Belgium (1839-Present) is a (★) nation with the hard difficulty. It is neutral in A.D 1865 and sides with the Entente in A.D 1914 and A.D 1917.

A.D 1865
Belgium starts off in the Lowlands so it borders France, the Netherlands and the German Confederation. It only has Brussels, a Corvette and a Light Infantry unit. German soldiers are in its territory as they're fighting French soldiers.

A.D 1914
Belgium is now a playable nation but are almost impossible. Their allies are the United Kingdom, France, the Russian Empire, Italy, Portugal, Romania, Serbia, Montenegro, and Greece. Their general is Albert I (Infantry). They also have a horwitzer behind Brussels. The reason why Belgium is so difficult is because the German Empire has 3 of their 5 generals near their borders. Options for expansion are low as the Netherlands is the only realistic way you can reasonably expand.

Strategy:
The easist strategy is to pay out Germany. You should do this twice or even three times. You should also pay in the United Kingdom and France so they join in immediately. Finnaly you should place Hindenburg on the Horwitzer. His Defensifive Fomation Will make defending easier. After that, you should save your money and make a militia everytime the troop in Brussels is destroyed. Your Allies destroy Germany. Try take a city off Germany such as Cologne. The only thing you can do now is give money to the Russian Empire as they normally lose against Turkey and Austria. Using this you can get a very good score.

A.D 1917
Belgium is slightly buffed as they have a second general and a stable. Their new allies are the United States, Peru, Brazil, Morocco, and Libya. Their generals are Louis Ruquoy (Cavalry) and Albert I (Infantry) This time its easier as there are British troops near you to fight the Germans so you can build up your army while they along with the French fight the Germans.

Strategy:
No strategy has been found yet, suggest in the comments.