at conventions
have taken place in every campaign
A LOT!
The Mahabharata, one of the major ancient Indian epics, is believed to have taken place around 3100 BCE.
There have been a great many major events that have taken place in Iraq. These events include the Iraq war.
He has not yet been chosen - the convention has not yet taken place. He merely announced his intention to run as a candidate.
The prohibition then legalization of alcohol.
The Battle of Shiloh had taken place from April 6 to April 7, 1862. The Battle of Shiloh was fought in southwestern Tennessee. It was one of the major battles of The American Civil War.
Trump has not yet taken office. None of his nominations for cabinet posts have been confirmed yet. Some of them are quite controversial.
President-elect
The martial arts are constantly changing. In the overall picture of things they are minor changes.
Excavations have taken place in Hasthinapur.
There is no event that would not have taken place if there was a female heir to the british throne. Except perhaps the wedding of Charles and Diana. Also for conspiricy theorists Diana would have not been assassinated?