The United States has brokered a historic peace deal between Armenia and Azerbaijan, ending decades of conflict over Nagorno-Karabakh enclave. The agreement, announced on Friday, was hailed by US President Donald Trump as a major diplomatic breakthrough that will strengthen regional stability and open doors for trade and investment. The United States has brokered a historic peace deal between Armenia and Azerbaijan, ending decades of conflict over Nagorno-Karabakh enclave. The agreement, announced on Friday, was hailed by US President Donald Trump as a major diplomatic breakthrough that will strengthen regional stability and open doors for trade and investment.