Once upon a time the European Union rejected secondary sanctions which the U.S. used to press third party countries to follow its sanction regimes against other once:
Making use of the centrality of the US in the global economy, it has imposed ‘secondary sanctions’ on foreign firms, which are forced to choose between trading with US sanctions targets or forfeiting access to the lucrative US market. In addition, the US has penalized foreign firms for breaching US sanctions legislation.