The People's Mongolia or Outer Mongolia

We call them in that way because by the time the Mongolia divided into Chinese inner Mongolia(colon of China) and Republic of Mongolia(independent) the one Mongolia was innerly located and the outer Mongolia was in the outer direction!!So to separate them we call it one outer and inner by their location.

Mongolia was divided into two parts hundreds of years ago. There are many reasons for it. Inner and Outer Mongolia. Inner Mongolia is part of china now and Outer Mongolia nowadays is the Independent country Mongolia.

Outer Mongolia

It shortened it's name in 1992 from Outer Mongolia