What resulted from the rise of nationalism in Europe?

I believe Nationalism,which is a sense of national consciousness exalting one nation above all others and placing primary emphasis on promotion of its culture and interests as opposed to those of other nations, had the most impact on history of any of the eras. One reason is that Nationalism led to Militarism and the belief that a nation needs a powerful standing army to protect itself from outside attack. The countries, especially the lesser ones, began to fear invasion from their neighbors, with good reason in reflection to Napoleon's reign. This fear led to an alliance system within Europe to insure protection. This alliance system would later play an enormous role in WW1 and WW2. Another reason is that Nationalism was the start of independence and revolutions. During the French Revolution, Nationalists came to believe that each nationality should have its own government which sparked revolutions across all of Europe transforming the countries of the continent. Some new countries, such as Germany and Italy were formed by uniting smaller states with a common "national identity". Others, such as Romania, Greece, Poland, and Bulgaria, were formed by winning their independence.