"Ten kraj nie ma wojska."

Translation: This country has no army.

[Maruf89]

"This country does not have troops" - gave me an error because I didn't have "the" before troops.

[Jellei]

Added now.

[Rpeluffo]

It could be "this country doesn't have army", or not?

[Rpeluffo]

It has to be "an army".. In my language there is no need of this article for army... I am not sure for English but OK...

[Rimdus]

Costa Rica nie ma wojska.

[Jellei]

Po polsku ten kraj nazywa się "Kostaryka" :)

[gkouye]

"Nie ma" has almost always been translated as "there is no", so I would have assumed that "there is no army in this country" would have been accepted.

[gkouye]

Although, there's no "w" preceding "this country", so maybe nevermind...

[Jellei]

Yes, on one hand "nie ma" is a construction meaning "there is no", but there's still the basic, literal meaning of "he/she/it does not have". As your second comment says, it would need to be "W tym kraju" for the "there is no" meaning.