The Karelian Isthmus was created on 1992-11-01.
The Karelian Isthmus
There are many isthmuses.https://en.wikipedia.org/wiki/List_of_isthmuses
Africa and Asia touch at the Isthmus of Suez.
Isthmus of Panama
North America and South America
Karelian Autonomous Soviet Socialist Republic was created in 1923.
North and South America
A Karelian Bear Dog looks like a husky with border collie markings
Pretty much all Central American countries are on an isthmus, but you probably want Panama.
Asia and Africa are connected by an isthmus. An isthmus is a narrow strip of land connecting two larger land masses. The Isthmus of Suez is in northeast Egypt. It connects North Africa with Western Asia. The isthmus is located between the Gulf of Suez to the south and the Mediterranean Sea to the north. It's between North Africa and the Sinai Peninsula.
The area of Karelian Autonomous Soviet Socialist Republic is 147,000 square kilometers.