Austria-Hungary is a powerful eastern European nation that is an ally of Germany. Austria-Hungary has almost 40 million citizens, making it a fairly large population. Austria-Hungary has strong military with many imported German weapons used as normal weapons. Austria-Hungary is ruled by an Emperor, although there has been an increasing movement to change into a fascist state. The Austria-Hungarian economy is stable and brings in a profit.
The Austria-Hungarian Empire was the second largest Central power in WW-I, sending six million troops to fight the Allied powers. It invaded Serbia and Romania, conquering both easily. Its losing point was the Invasion of Italy. In the legendary battle of Milan, a small force of Italians defeated a large Austro-Hungarian army and slowly pushed the Austria-Hungarians out of Italy. Austro-Hungary came out of WW1 as one of the only countries to lose territory, losing the strip of the coast and some far eastern lands. Austro-Hungary couldn't wait to pay the Allies back.
In WW-II Austria-Hungary sent large armies to help the Soviet Union fight the Russian Empire. Austria-Hungary saw limited military action, as they only invaded the Soviet Union and Greece and Yugoslavia along with Italy. When the war was won, Austria-Hungary got limited land gain as Italy and Germany captured huge swaths of territory. Austria-Hungary did get control over the puppet states of Yugoslavia and Greece.
After WW-II Austria-Hungary went into a period of isolation. During this isolation Austria-Hungary made itself into one of the world's most technologically advanced powers, with many schools being built, voting rights expanded, and communication increased. Austria-Hungary is a large producer of tech, with many important computer and car manufacturers in Austria-Hungary. Austria-Hungary continues to be isolationist, and in a series of campaigns in 1981-1985, Austria-Hungarian armies crushed uprisings while the Germans were still dealing with the aftermath of the 1976 insurrections. In the Increased Prosperity Act of 1994, the Austria-Hungarians demanded more taxes from its puppet states due to the increased spending in the Austria-Hungarian government. Austria-Hungary and other South-Eastern European nations signed the South-East Europe Free Trade Agreement (SEEFTA), allowing increased flow of goods with less tariffs between the nations to increase prosperity.