Board Thread:General Mod Discussion/@comment-26065088-20160624191138/@comment-25661985-20160629125347

MrHobit1234 wrote: I think that Gundabad and Dul Guldor all fell under the dominion of the ring thus under the Sauron. According Tolkien Gateway, by the time of the War of the Ring, the Orcs of the Mountains though permanently depleted, reclaimed Moria but fell under the command of Sauron and Saruman.

However, it seems like the Orcs of the Mountains have no relation with Mordor and Isengard, which is the reason why I suggest this.