As a consequence of its membership of a US-centred global alliance network, Australia’s regional obligations in the South Paciﬁc are as pertinent to Regional Assistance Mission to Solomon Islands’s drawdown as they were to its inception. Canberra’s imperatives in the Paciﬁc have been stabilization and the exclusion of hostile interests. Three challenges—the rise of China, the Islamic State insurgency, and the democratic discontinuities in key regional players—have undermined interest in interventions in both Australia and the US. The growing inﬂuence of Asian powers in the Paciﬁc has given rise to new exclusion concerns in Australia, and to a greater degree in the US. Rather than retrench from the South Paciﬁc, Canberra has an opportunity to re-conceive the Paciﬁc as an arc of opportunity, particularly in developing new forms of engagement with rising regional powers.