Since world war ii and through the 1980s, the united states admitted three groups of refugee in large numbers. they were hungarians, southeast asians, and

Cubans

Between 1980 and 1990,  nearly 590,000 refugees from Southeast Asia (Vietnam, Cambodia, and Laos) were admitted into the U.S. More than 30,000 Hungarians were admitted under the Hungarian Refugee Act of 1958 while almost same number (more than 30,000)  Cubans  were admitted to the U.S since world war ii and through the 1980s.

they have different colored collars

russia because it is the biggest state