if you have nothing to lose, you dun need anyone to guard
"nothing".
if you need to guard something, you can use your own guard.
Or you can have some other party to guard you, provided this party
can be trusted.
Like in HK, before 1997, some of the british army stay there, even
its not really needed.
After 1997, the chinese army take over the job.
The british "borrowed" HK for a time limit under agreement, so
China wont attack HK to take it back, for Taiwan, it's not under
agreement for Guo Min Dang to stay in taiwan and declare Taiwan as
a country, so they need an army in case china attack them to take
it back.
