uspostaviti

1. (of contact, relations) to establish; to set up
   Dve zemlje su uspostavile diplomatske odnose. — The two countries established diplomatic relations.
   Konačno smo uspostavili kontakt sa njima. — We finally made contact with them.
2. (of peace, order) to restore
   Policija je brzo uspostavila red na ulicama. — The police quickly restored order on the streets.

The imperfective is uspostavljati.