How to pronounce “marsch” in English

In fact, I use these two covers because the "Geographic" article, which Ballard wrote, shows only the little remote robot, doesn't deal with Alvin at all.And the "Time" magazine cover-- which actually, Ken Marschall lives out here in LA, did this painting off-- shows only Alvin.And this is why a lot of people still to this day think that Alvin discovered the Titanic, which it didn't.