Which preposition to use with enclave

of Occurrences 3%

Sometimes little enclaves of high value hide themselves in the midst of degradation, as Venice and Ireland in the Dark Ages.

in Occurrences 1%

After the fall of the communist enclave in Kiangsi, the prospects for the Nationalist regime were bright; indeed, the unification of China was almost achieved.

on Occurrences 1%

It will not be disputed that the commercial and political arrangement as regards Morocco creates favourable conditions of competition for our manufacturers, entrepreneurs and merchants; that the acquisition of territory in the French Congo has a certain and perhaps not inconsiderable value in the future, more especially if we succeed in obtaining the Spanish enclave on the coast, which alone will make the possession really valuable.

Which preposition to use with  enclave