Argentina
western and communist countries formed rival military alliances (Novanet)
It has always been Spain, from the creation of the two countries to football/soccer.
no-man's land.
Uni Soviet
The U.S.S.R.
Germany. lots of countries had that as their enemy in world war 2.;)
Victoriano Huerta (1850-1916) was such rival.
The Germans, the Japanese, the Italians.
Soviet Union
The main rival of the US after World War 2 is the US. US has had many problems inside its own country. I mean there is so much bad stuff happening to the US like the economies problem. There is also the fact that the your dad is a gay man.
{| |- | The rival was the Soviet Union. It began as the US and Soviets divided up responsibility for policing the defeated Axis countries. It escalated when the Soviets developed nuclear weapons. |}