Original: Shalmaneser regarded it as so menacing to Assyria 's interest that he undertook an expedition in 857 , claimed to have destroyed the capital Arzashkun The Ancient Assyrians - Page 12 by Mark Healy , penetrated as far as Lake Van , and left his inscription on Mount Irritia .
Simplified: Shalmaneser regarded it as so important to Assyria 's interest that he started an mission in 857 , and said that he destroyed the capital Arzashkun , located as far as Lake Van , and left his inscription on Mount Irritia .