Answer: Tensions were not created "overnight."
Step-by-step explanation:
Long-term tensions among European states ultimately resulted in the First World War. Nationalism began to strengthen after the French Revolution. Countries closed themselves in their national camps, which created affiliation to one national identity. In such circumstances, many considered themselves superior to others. Some countries had common interests. For example, Germany and Austria-Hungary advocated equal colonization of third world countries. Britain and France were at the forefront of colonization and wanted a majority for themselves. The Ottoman Empire was also involved in the whole story. The Ottoman Empire was not as strong as before, but they also wanted to keep certain possessions. Such circumstances would lead to the creation of an alliance, which increased tensions between the states.