It was recorded in May and June 2006 and was released in Europe on 22 September 2006 by Metal Blade Records. A limited edition digipak was also released with a second disc that includes live songs, demos, and unreleased recordings. With Oden on Our Side was also released on a limited red LP. The songs "Runes to My Memory" and "Cry of the Black Birds" were both made into music videos.
With Oden on Our Side takes on a heavier approach compared to their previous album Fate of Norns; according to vocalist Johan Hegg, in an interview with Dutch metal magazine Aardschok, the album would go back to their roots such as their debut, Once Sent from the Golden Hall. When asked about the meaning of the album's title, Hegg remarked:
Well, it kind of has several meanings to it. Oden is of course the highest god in Scandinavian mythology, and he's the god of warfare, wisdom, poetry and artistry. The reason we chose the title is that it suited the lyrical concepts of the album and signified the feeling we had during the writing and recording of the album. We literally felt as if we had the Gods on our side.
The album cover art features the Norse God Odin riding on his fabled octopedal horse Sleipnir in a depiction borrowed from the Tjängvide image stone. The background depicts the Valknut, a symbol whose meaning is uncertain, though archeological evidence clearly shows it to be associated with Odin. Letters of the Runic alphabet can be seen on the edges of the triangles forming the Valknut. The Runes on top spell out "With Oden on our Side", whereas the bottom right runes spell "Amon Amarth" using characters from the Elder Futhark.