Identify and explain the reason western political boundaries changed between 1870 and 1900.

The Victorian Era was largely a time of stabilizing governments and expanding empires. Many new nationalistic entities came into being during this time, such as the German Empire and the Kingdom of Italy, as well as the Austro-Hungarian Empire. This was also a time where many states in the Balkans which were formerly a part of the Ottoman Empire, such as Bulgaria, Serbia, Montenegro, and Greece, would begin to have their own political and military events, both among each other and against their former rulers, the Ottomans.