But with the introduction of new direct embroidery technology in the 1980s, the embroidered patch industry underwent a major upheaval.

The world of the small hog farmers has undergone an upheaval in the last decade.

All of nature would undergo a tremendous upheaval.

Man's line up had recently undergone a major upheaval.

But it is clear that this is a people that has undergone a huge upheaval.

During the 1890's, he explains, the social sciences underwent "a great upheaval."

The Earth he comes back to, however, has undergone a devastating social upheaval.

As it happens, he had entered a region that was undergoing a social and political upheaval.

Our nation is undergoing an economic upheaval the likes of which we have not seen since the Great Depression.

During those same 10 years, 1956 to 1966, America was undergoing a major social and cultural upheaval.