IIRC Eritrea has been a rather lonely nation diplomatically, but the war in the Yemen may have changed this:
In May 2015, Saudi Arabia and the UAE concluded a new military security partnership agreement with Eritrea allowing the Gulf coalition to use its land, airspace, and territorial waters for Yemen operations. The agreement also included a thirty-year lease for the port of Assab, on Eritrea's coast, as a UAE naval logistics hub. Since September, the UAE has used Assab as a launchpad for amphibious operations against Yemen's Red Sea islands and in November began flying strike sorties over Yemen from Asmara International Airport -- strikes that followed an agreement with the Eritrean government to refurbish the airport. Four hundred Eritrean troops were also contracted to serve embedded with the UAE armed forces in Yemen.

Sudanese hold force for Aden. In mid-October, UAE landing craft transported two Sudanese battalions equipped with BTR-70 armored personnel carriers from Assab to Aden.
Link:http://www.washingtoninstitute.org/p...the-ground-war