Answer:
2021.
Step-by-step explanation:
AUKUS (/ˈɔːkəs/, AW-kəs), also styled as Aukus, is a trilateral security pact between Australia, the United Kingdom, and the United States, announced on 15th of September 2021 for the Indo-Pacific region. Under the pact, the US and the UK will assist Australia in acquiring nuclear-powered submarines.