James Ricketson was sentenced to six years in a trial his sympathisers described as farcical because prosecutors never specified whom he was spying for and failed to present evidence that he possessed or transmitted any secrets.
PM Hun Sen's ruling Cambodian People's Party said on Monday it had won all 125 parliamentary seats up for grabs in a general election a day earlier, a vote heavily criticised by rights groups, the United States and other Western countries.
Hun Sen, who ruled Cambodia for nearly 33 years, took 'selfies' with supporters and enjoyed a boat ride following Sunday's election in which his Cambodian People's Party (CPP) said it had won all 125 parliamentary seats.
The White House said it would consider steps, including an expansion of visa restrictions placed on some Cambodian government members, in response to "flawed elections" in which there was no significant challenger to Hun Sen.
Hun Sen, who has ruled this Southeast Asian nation for over 30 years, has had virtually no opposition since November when the opposition Cambodia National Rescue Party (CNRP) was dissolved by the Supreme Court at his government's request.
The military aid more than $100 million grant was offered by China's defense minister Wei Fenghe, who is currently in Phnom Penh to attend a China-Cambodia military exhibition, during a visit that began on June 16 and will end on Wednesday.