Now say the PRC occupied a country that was a mid power and had a similar social, economic, communications infrastructure to say Singapore. The occupied country has a territorial force that specialises in guerrilla warfare and sufficient war materials have been stockpiled at various locations in country to provide for an ongoing Partisan resistance.
Let me say 4 more points, to clarify:
1. There are only 2 countries that the PLA trains to invade and occupy — it is Taiwan and North Korea (in the event of a regime collapse); and only if the Taiwanese decide declare independence. The PLA(N) trains to fight against the USN and the JMSDF up to the 2nd island chain, to deter them from intervening in a Taiwan active hostility scenario; and the PLA are not planning to invade and occupy Japan proper.
2. Even though Singaporean troops have been training in Taiwan since 1975 (Exercise Starlight — 星光计划), China, in general, is not hostile to Singapore and they are not part of our threat matrix (for the Army). Below is a Jan 2020 Taiwanese news report of a Singapore Commando trainee who was taking part in a night static line parachute jump (as part of his Basic Airborne Course) in Taiwan on 18 Dec 2019 when he faced a "static line interference", which saw the line sweep across his neck. At a Taiwanese hospital, a MRI scan revealed that Pte Quek had sustained a cervical spine injury. A previous Mindef statement on 2 Jan 2020 said the Chief Commando Officer, Colonel Kenny Tay, had visited and spoken to him and his family at the hospital. This is a known risk for the 6,000 static-line parachute jumps conducted every year and occurs when the line is too slack, interfering with the jumper's exit. The 21-year-old was able to land within the designated landing area but he sustained injuries to the neck during the jump; and evacuated by our A330MRTT.
(a) If the PLA shoots at the SAF, it’s worse than a own goal. It’s like scoring a own goal and then deciding that head butting the referee is part of the game (in this case, the referee is ASEAN) — since 2008, we have an Agreement on Defence Exchanges and Security Cooperation (ADESC) with the PLA; and in Oct 2019 the agreement between PLA and MINDEF, was enhanced, including the establishment of mutual logistics support arrangement with China.
(b) Singapore has an omnidirectional deterrence policy but is not hostile to anyone, even if they have a track record of hostility to us (and here I am thinking of Malaysian antics in 2018).
3. China does have border disputes with countries like India or Vietnam, from time to time, but they do not stay, even after a border war.
(a) In the case of India in 1962, the PLA stayed for about a month after their victory over the Indian Army — a war that was caused by 10 years of Indian policy of armed hostility. The
Aug 1952 Longju clash was not accidental but reflected the basic Indian approach to border disputes: territory claimed by India should automatically become Indian territory. This approach made the 1962 conflict with China ultimately inevitable. And by mid-1961 India’s attempted implementation of its territorial claims turned the border areas into conflict zones. Beijing’s urgent calls for diplomatic negotiations were being flouted and Indian troops were continuing to press forward in the western sector. Beijing decided there should be no retreat under Indian pressure. Since India was rejecting China’s calls for peaceful coexistence, Mao quipped, it should be confronted with ‘armed coexistence’.
(b) In the case of Vietnam in Feb/Mar 1979, the PLA withdrew after 3 weeks and 6 days — with their invasion informally supported by ASEAN (at that time), as it reduced the likelihood of Vietnam going further south. In contrast, Vietnam’s occupation of Cambodia for 10 years and 9 months, was resisted by ASEAN, through our supply of arms to the rebel groups.
4. Back then, Singapore was hostile to Vietnam for their invasion of Cambodia (25 Dec 1978 to 26 Sep 1989) and supplied weapons to the Cambodian resistance. When Vietnam invaded Cambodia, they were a client state of the Soviets — see this Dec 1989 Rand note on:
Clients and Commitments.
(a) In 1988, I went to Thailand with my infantry battalion to train in Exercise Cresendo — knowing that the Thai army was on the frontlines, facing the very real Vietnamese military threat.
(b) Thailand was against the acceptance of Vietnam’s invasion, and cooperated with ASEAN (then comprised of Thailand, Malaysia, Indonesia, the Philippines and Singapore) to oppose the Vietnamese occupation at the United Nations.
(c) To this day, ahistorical Vietnamese netizens continue to take offence on the use of the word "invasion", preferring words such as "liberation" instead. To them, Vietnamese troops were seen domestically as putting an end to the Cambodian genocide carried out by the Khmer Rouge regime in the 1970s.