Why not how to start a war with malaysia?
Steps
1) Bomb ourselves and blamed it on malaysia
2) Serectly talk terms with indonesia, thailand, brunei to attack together, using sabah, sarawak and upper half of malaysia as exchange
2) Send troops within 5 mins of notice, which are already station at critical point few hours ago
Alternative
After Step 1, Get USA to come in to take over the country, then later somehow or rather get the power to put them under our charge. Do a poll in johor or the whole malaysia to make them part of singapore.
I am seriously not thinking straight