Ameliorate Post WW I

Directions: Students should ameliorate the following sentence, in red. There is a missing colon (:), proper nouns that need to be capitalized, several misused words, and missing commas.
after world war 1 many new county's was created poland czechoslovakia palestine latvia iraq was among them

SUGGESTED ANSWER: 

After World War One, many new countries were created: Poland, Czechoslovakia, Palestine, Latvia, Iraq were among them.