When Mexico refused to pay its debts to European countries, FRANCE SET UP A NAVAL BLOCKADE, TOGETHER WITH SPAIN AND ENGLAND; THEY TOOK TROOPS TO THE MEXICAN PORT CITY OF VERACRUZ. Mexico was able to negotiate with Spain and England but not with France; France was interested in conquering Mexico.
Explanation: fear because if they create fear people will be willing to do what these terrorist groups want them to do such as partake in a new religion, join them, etc.