The crimean war ended the concert of europe since russia and austria were at war with each other, how do you think that will affect other nations in europe during the next 20 years when russia decides not to enter any wars?

Explanation:

he Crimean War was a military conflict fought from October 1853 to February 1856 in which the Russian Empire lost to an alliance of the Ottoman Empire, France, Britain and Sardinia. The immediate cause involved the rights of Christian minorities in the Holy Land, which was a part of the Ottoman Empire. The French promoted the rights of Roman Catholics, while Russia promoted those of the Eastern Orthodox Church. The longer-term causes involved the decline of the Ottoman Empire and the unwillingness of Britain and France to allow Russia to gain territory and power at Ottoman expense. It has widely been noted that the causes, in one case involving an argument over a key, have never revealed a "greater confusion of purpose", yet they led to a war noted for its "notoriously incompetent international butchery".