Ipiq-Adad II’s military expeditions are well documented by the Mari eponym chronicles which mention his campaigns to expand Eshnunna.
[4] Sin-iddinam's recent conquest of Malgium was extending his state north, in the direction of Eshnunna.
Ipiq-Adad's own expansion may have conflicted with Larsa's ambitions possibly motivating Sin-iddinam's raid of Eshnunna in 1844 BC.
[4] After these two brief incursions against Eshnunna, Ipiq-Adad II massively enlarged his state starting in 1828 BC when he took Arrapha to the north.
Then, to consolidate the Diyala region, he defeated Sin-abushu, king of Nerebtum and likely a vassal of Eshnunna.