Australia, NZ, Canada and Malaysia sign the Pacific Mutual Defense Alliance in Johor, in 1960.
| Nation. | Year of joining. | Year of leaving. |
|---|---|---|
| New Zealand | 1960 | - |
| Australia | 1960 | - |
| Canada | 1960 | - |
| Malaysia | 1960 | - |
| Panama | 1969 | - |
| Singapore | 1970 | - |
| Japan | 1970 | - |
| Taiwan | 1971 | - |
| Philopines | 1972 | - |
| Thailand | 1973 | - |
| Solomon Islands | 1974 | - |
| PNG | 1975 | - |
