Delta is what I believe the term is that you are looking for.
The China opened cultural
Studying the history of science allows you to have a glimpse into both the history of the world and into just how we discovered everything we know about the world. Those moments of discovery may seem anti-climactic to us now, but imagine not having discovered them at all. Imagine living without that knowledge.
Sweatt vs Painter was a US Supreme Court case that successfully challenged the "separate but equal" doctrine of racial segregation established by the 1896 case Plessy vs Ferguson. The case involved a black man, Herman Marion Sweatt, who was refused admission to the School of Law of the University of Texas.
Answer:
It Nazi Germany's code name for the plan for an invasion of the United Kingdom during the Battle of Britain in the Second World War