The dual monarchy was the result of Austria Prussian war and Franco Austrian war that resulted in great economic losses and lost collapse of the ​Habsburg Empire, who in order to save the empire entered into a compromise and formed dual moanrchy.

The Dual Monarchy in Hungary was the result of a series of events that took place in the late 19th century. Here are the details:

1. The Austro-Hungarian Compromise: In 1867, after the Austro-Prussian War, the Austrian Empire was reorganized and the Austro-Hungarian Compromise was signed. This agreement gave Hungary a certain degree of autonomy within the empire.

2. The Hungarian Diet: As part of the compromise, the Hungarian Diet was established. This was a parliament-like body that had the power to make laws and approve the budget for Hungary.

3. The Hungarian Language: Hungarian became the official language of Hungary, and it was used in government and education.

4. The Dual Monarchy: In 1867, the Austro-Hungarian Empire was established, with Franz Joseph I as the emperor. Hungary had its own government, led by a prime minister, but it was still part of the empire.

5. Consequences of the Dual Monarchy: The Dual Monarchy had a number of consequences, both positive and negative. Here are some of the key ones:

- Positive: The Dual Monarchy allowed Hungary to have a degree of autonomy within the empire, which gave the country more control over its own affairs. This led to a sense of national pride and helped to strengthen Hungarian identity.

- Negative: The Dual Monarchy also had some negative consequences. For example, it led to tensions between the different ethnic groups within the empire, as some felt that their own cultures and languages were being marginalized. This eventually led to the breakup of the empire after World War I.

Overall, the Dual Monarchy in Hungary was a complex and important historical event that had a lasting impact on the country and the wider region.