John Kerry wrote his Review for "Apocalypse Now" on Oct 14, 1979 in the Boston Herald.
The key words in this scan are on page two
"On more than one occasion, I like Martin Sheen in "Apocalypse Now," took my patrol boat into Cambodia. In fact I remember spending Christmas Eve of 1968 five miles across the Cambodian border being shot at by our South Vietnamese allies who were drunk and celebrating Christmas. The absurdity of almost being killed by our own allies in a country in which President Nixon claimed there were no American troops was very real."