It is interesting to read this review of Heidegger's Mindfulness (Besinnung) by Miguel de Beistegui in the context of Sam Peckinpah's Cross of Iron.

de Beistegui says that Mindfulness (see § 10) provides a very clear description of the situation of Germany, and Europe in general, in 1938-1939: according to Heidegger, world-events unfold against the backdrop of the "military thinking that comes from the [first] World War" and "the unconditionality of armament." Yet these are only manifestations of the "completion of the metaphysical epoch," which has turned the human into a technical (and technicised) animal, and a predator (a Worker-Warrior). It is possible to reconnect this time to the 'war on terror' today, with its strong emphasis on military thinking and warriors.

de Beistegui adds for Heidgger in the late 1930s:

The War and the Peace of our time are two sides of the same coin, two possibilities that arise from the same onto-historical configuration, and which fail to bring us face to face with what's really decisive. The real decision, according to Heidegger, is whether we, as human beings, will continue to think our relation to the world, the earth, and others (whether in war or in peace) metaphysically (and this means as a situation in which the human, as worker and predator, is the central concern, as a situation that witnesses the convergence of power, violence, technics, and worldview), or whether we will be able to open ourselves to the essence and truth of this metaphysical situation, and this means to the essence and truth of be-ing itself, in which man can finally come into his own (and which, as we'll see shortly, implicates a unity of war and peace of a different kind, a very specific harmony between opposites engaged in a constant strife).