Arch rivals Trump and North Korean leader Kim Jong-un will meet soon, puzzling pundits whether the two, who called each other names, will forget and formally shake hands.
The conditions of the pact and the concrete measures that will be implemented were detailed in a 177-page deal that was negotiated between January and February.
The anti-establishment Five Star Movement, ruling Democratic Party and former Prime Minister Silvio Berlusconi's right-wing coalition have all predicted victory.
Since 2014, Singapore's army SAF is providing intelligence fusion officers, KC-135R tanker aircraft, imagery analysts, SAF liaison officers and medical teams to Iraq.
Moon's remarks came amid Tokyo's repeated calls for him and his administration to honour the 2015 agreement made with South Korea's ousted administration.