The correct answer is the Iron Curtain.
The term iron curtain was made popular thanks to a speech given by Winston Churchill in 1946. In this commencement address, Churchill discusses how an "iron curtain" has descended upon Europe, splitting this area into satellite nations controlled by the communist Soviet Union and the countries free of Soviet control and influence. This metaphorical barrier would be referred to constantly during the Cold War era.
The Hittite Empire was able to survive even attacks by rivals because they had iron weapons. the Hittites were the first people to exploit this capability, who were able to defeat the armies of Ramses II in the 12th century B.C. The Hittites the were first users of iron, they began to produce iron tools and weapons around 1400 B.C.E, they tried to keep their metalworking methods secret.
<span>(800 BC</span>-146 BC) I think
Hope this helps c: