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A military alliance is an
Military alliances are related to
The obvious motivation in states engaging in military alliances is to protect themselves against threats from other countries. However, states have also entered into alliances to improve ties with a particular nation or to manage conflict with a particular nation.
The nature of alliances, including their formation and cohesiveness (or lack thereof), is a subject of much academic study past and present, with the leading scholars generally considered to be
According to a 2019 stidy, almost all alliances from 1870 to 1916 were covert. In other time periods, covert alliances have been rare. The study argues that from 1870 to 1916, the unusual amount of covert alliances was incentivized by other covert alliances. The creation of public alliances would signal to the covert ally that the public alliance was more valuable.