The Senate has unanimously signed approval for an inquiry into Australia’s deployment in Afghanistan over the past twenty years and the subsequent military withdrawal.

Independent Senator Jacqui Lambie is responsible for pushing the investigation, and said that "while there’s lots to be proud about, we clearly didn’t achieve the outcome we wanted."

Lambie said she’s happy the senate unanimously voted in favour of the inquiry, which will examine all the procedures and objectives of Australia’s longest war.