The system which was in practice was the Shogunate system. It was between the two restorations and was about Shoguns who were military leaders. The period was marked by sever isolation and it ended during the Meiji restoration when the Shogunate ended.
Answer:
1. The Enlightenment
2. The Napoleonic Wars
3. The Congress of Vienna
4. German Unification
Explanation:
The enlightenment: started either 1701 or 1650
German unification: 1871
The Congress of Vienna: November 1814 to June 1815
The Napoleonic Wars: 1803 - November 20, 1815
Because the Napoleonic wars were just wrapping up when the Congress of Vienna started, i would place it ahead.