It's a real shame that so many non-English-language films from the 1980s are out of print these days. As I try to watch these older movies that I have heard of or simply seen their names on lists, it can be really difficult to get ahold of some of these movies. (The Dartmouth Library) is helping me as best as it can at the moment.
Still, the film is sturdily made in a kind of 1980s Romantic vein, and it boasts some excellent performances, particularly by Derek de Lint. And it certainly doesn't deserve to be out of print like it is. As far as I can tell, The Assault is only available for purchase in the U.S. in a dubbed-into-English VHS edition that is only available used (current price $45). This is a real shame!
The style of The Assault is out of fashion right now – it would be remade quite nicely, I expect – but it is a great story. It's a good mystery and an emotionally rich situation.