These alliances often did not last as they either collapsed when new leaders took over or were replaced by other alliances. Sometimes this was just a move to isolate and starve their rivals.It was not uncommon for kings and princes to form, reform, or restructure alliances in an attempt to benefit their interests. In the 1700s, alliances were both a defence measure and a political instrument. Alliances prevented larger, stronger states from waging war on the smaller, weaker states.As France and Russia were sworn enemies, this alliance gave some of the European states some protection. Another example was the relationship between France and Germany.An example was France and England, who were ancient rivals, which led to open warfare several times.For centuries, there had been ethnic, political, and territorial rivalries in Europe, and they would often, due to paranoia, lead to war. Alliances were not a new thing in European history.It was common during the 19th and early 20th centuries for European nations to form, annul, and restructure alliances regularly.Moreover, alliances can also be economic terms, such as bilateral or multilateral trade agreements, investments, or even loans. These terms are usually present in an alliance document.Alliances usually contain pledges that if a war or an act of aggression occurs, one nation will support the other in terms of an army that is mobilising troops, weapons, and relief.Military alliances were (and still are) the most common alliances during and after World War I. An alliance can be defined as a formal, economic, military, or political agreement between two or more nations.Such alliances created national tensions and rivalries among nations in Europe. Patterns involved a network of treaties, agreements, and ententes were signed before 1914. Before the First World War, alliances already existed in the 1800s.Let’s known more about the Alliance System

When does league of three emperors end