Australia is confident its wide-ranging security agreement with the US and UK will push ahead despite a Pentagon review, people familiar with the matter said, with Canberra recently announcing at least $9 billion in related defense investments.

The Trump administration's review of the so-called Aukus agreement, which was , is focused mainly on reinforcing the pact rather than unraveling it, according to the people familiar, who asked not to be identified discussing internal deliberations.

Australia's announcement over the weekend -- that it will spend $8 billion on a related to build naval ships and service ...