In November 2008, the day of the presidential election, Israeli military forces invaded Gaza and killed half a dozen Hamas militants. Well, that was followed by a missile exchange for a couple of weeks in both directions.
In 1963, the U.N. Security Council declared a voluntary arms embargo on South Africa. That was extended to a mandatory embargo in 1977. And that was followed by economic sanctions and other measures - sometimes officials, countries, cities, towns - some organized by popular movements.