The act of keeping something dangerous under control or within limits.
If you need an example think of quarantine the dangerous disease be Corona Virus and to keep it under control we are staying inside.
The XYZ affair led to a period of anti-French sentiment in the United States, which was problematic as the French has been the key ally during the American revolution some 20 years before and was one of the primary reasons the United States was able to defeat Great Britain.
However, over those 20 years, France had undergone a revolution of their own and the United States decided to remain neutral in France's war against Great Britain.
A criminal case begins with a person suspected of a crime is indicted by a grand jury or otherwise charged with the offense by a government official called a prosecutor or district attorney.