The sky receded like a scroll...

Revelation 6:14
"The sky receded like a scroll, rolling up, and every mountain and island was removed from its place. "

This is clearly talking about the end of WWII, when the atomic bomb dropped on Hiroshima/Nagasaki. This technology was not existing in 97AD, when Apostle John received the Revelation, so he used an object that was existing (a scroll rolling up) to describe this event that shook the island of Japan.

So, "After this" in Revelation 7:1 means "After WWII". Now that we know that the Bible testifies that the winds mean war, then what is it in fact that the angels are preventing...

THEY ARE HOLDING BACK WORLD WAR THREE.

The Sealing of God's people, beginning in the east, will happen after WWII and before WWIII.

Isn't that the time we are living in now? We must receive the Seal of God!