(Adds details from the courtroom in paragraphs 2-3, changes dateline)
By Minwoo Park
SAIPAN, Northern Mariana Islands, June 26 (Reuters) - W ikiLeaks founder Julian Assange on Wednesday reached the Northern Mariana Islands, where he is expected to plead guilty to violating U.S. espionage law that will set him free and allow him return home to Australia.
Assange, 52, arrived at the court house in a white SUV. He was wearing a black suit and smiled as he walked past security with his team and Australia's ambassador to the U.S. Kevin Rudd.
Dozens of media from around the world gathered outside the courtroom to cover the proceedings. Media is not allowed inside the courtroom to cover the hearing.
Assange agreed to plead guilty to a single criminal count of conspiring to obtain and disclose classified U.S. national defence documents, according to filings in the U.S. District Court for the Northern Mariana Islands.
The U.S. territory in the western Pacific was chosen due to Assange's opposition to travelling to the mainland U.S. and for its proximity to Australia, prosecutors said.
If the judge approves his plea, Assange is expected to return to Australia, U.S. prosecutors have said.
"Julian Assange has arrived on U.S. territory at Saipan Island to formalise the plea deal that should never have had to happen," Wikileaks said on X.
Assange is due to be sentenced to 62 months of time already served at a hearing in Saipan in the Northern Mariana Islands, at 9 a.m. local time (2300 GMT Tuesday).
Australian-born Assange spent more than five years in a British high-security jail and seven holed up in the Ecuadorean embassy in London as he fought accusations of sex crimes in Sweden and battled extradition to the U.S., where he faced 18 criminal charges.
Assange's supporters view him as a victim because he exposed U.S. wrongdoing and potential crimes, including in conflicts in Afghanistan and Iraq. Washington has said the release of the secret documents put lives in danger.
Australian governments have been advocating for his release and has raised the issue with the United States several times.
"For any Australian to be in a position of being in protracted incarceration without legal resolution is a situation where the government should be advocating on their behalf and we have been doing that," Deputy Prime Minister Richard Marles told ABC television on Wednesday.
Marles added that Assange's release would not sour relations between Australia and close ally United States.
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