Summary: The overall gist of this is that America will be going through 3 years of dark times, lack, famine, plague, etc, spanning from roughly middle 2022, to middle 2025. The goal of this is to prepare the harvest (see the "A Worldwide Pre-Tribulation "End of Age" Harvest and Revival" prophecy for more details on what the "harvest" is), and to remove the deception from the body of Christ. So it'll be one gigantic wake-up call for both Christians, and the unsaved, with the goal of bringing in the unsaved to Christ.
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Admin Note: Some other proofs for this can be found on the "Famine in the midst of Plenty" and "Global Economic Reset" prophecies as those same events that are shaking the world are winnowing the church at the same time.