When Atarshumki I was king of Bit Agusi what was the name of the capital?
Bit Agusi Bit Agusi (also written Bet Agus) was an ancient Aramaean Syro-Hittite state, established by Gusi of Yakhan at the beginning of the 9th century BC. It had included the cities of Arpad, Nampigi (Nampigu) and later on Aleppo. Arpad was the capital of the state-kingdom. Bit Agusi stretched from the A'zaz area in the north to Hamath in the south.
Marhasi Marhaši ("Mar-ḫa-ši" , "Marhashi", "Marhasi", "Parhasi", "Barhasi"; in earlier sources Waraḫše) was a 3rd millennium BC polity situated east of Elam, on the Iranian plateau. It is known from Mesopotamian sources, but its precise location has not been identified, though some scholars link it with Jiroft. An inscription attributed to Lugal-Anne-Mundu of Adab (albeit in much later copies) mentions it among the seven provinces of his empire, between the names of Elam and Gutium. This inscription also recorded that he confronted their governor (ensi), Migir-Enlil of Marhashi, who had led a coalition of 13 rebel chiefs against him.