As I said there are a great many times in the history of man that catastrophic events have occured that seemed to be the end such as the Black Death which killed 1/4-1/2 of the earth’s population. As for me no mater how bad the scenario I would never presume to call it God’s Tribulation.
Well, the black death, was over the period of about eight years. About 75 million died which was about a fifth of the estimated world population. Although catastrophic it doesn’t reach the apocalyptic suddenness or proportions of the scenario contemplated here or in the tribulation of Revelation.