Quite naturally, all states try to ensure the safety of their citizens. Sometimes it happens that some states are too weak for that purpose and have to ask the help of allies. This led to the classical situation of overlords and vassals or more recently to the status of protectorate. Below is an example of the 19th century.

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Implications of the US Nuclear Umbrella

  • Peter Richmond,
  • Bertrand Roehner

摘要

Quite naturally, all states try to ensure the safety of their citizens. Sometimes it happens that some states are too weak for that purpose and have to ask the help of allies. This led to the classical situation of overlords and vassals or more recently to the status of protectorate. Below is an example of the 19th century.