Over the last years US, EU and UN have imposed sanctions to a number of countries and jurisdiction due to several reasons the most important of which are:
To force cooperation with international law.
In case they impose threat to peace within a geographical boundary.
In case of United Nations Security Council’s condemnation of actions of a country’s specific action or policy.
In response to the country’s support or active participation to activities related to Money laundering, Tax Evasion, Weapons of Mass Destruction
Proliferation and Narcotics and Psychotropic Substances and Human Trafficking.