- HD 1080
- Runtime: 103m.
- Status: Released
0
- Languages: cn
- Country: Hong Kong
- Director: Ringo Lam
- Stars: Danny Lee Sau-Yin, Tommy Wong, Rosamund Kwan Chi-Lam, Vernon Wells, Olivia Hussey
- Production_studio: Cinema City
- The Undeclared War is featured in the top rankings of 1990
- #42 in Top Action Movies of 1990
- #42 in Top Crime Movies of 1990
- #33 in Top Thriller Movies of 1990
A Hong Kong Special Branch cop and a CIA agent reluctantly team up to bring down a major international terrorist.