The defeat of the Spanish Armada in 1588 was important because it saved England from a Spanish invasion. Since Spain were involved in plots against her. She had to defend England's interests against the Spanish threat due to pressure for the public and her Privy Council.
Cavour and Bismarck used poitics, he knew he couldn't take down Austria on his own so he got help from the Napolion the third. Even though the French backed out he still got Northern Italy back.
Because they lack the viciousness of normal revolutions. There are claims that they do not change all that much even though ti appears so because only in violent and ferocious revolutions can the institutions of power truly be changed, like what was seen in Russia during the Communist revolution.
The Medical advancements that were made. As well as the scientific advancements. These two played a huge part in the War. Hope that this was helpful.
