Linked from
The 9 pages that link to Ussuri River, each with the reason it gives.
Primorsky KraiRelated: The river marks a major stretch of Primorsky Krai’s border with China.
Outer ManchuriaRelated: The territory east of it passed to Russia under the 1860 convention.
Amur AnnexationRelated: The treaties placed lands east of the Ussuri under Russian sovereignty.
AmurRelated: Its confluence enlarges the Amur and lies near a major border region.
Bolshoy Ussuriysky IslandRelated: The island lies at the Ussuri's confluence with the Amur.