In the build-up to the Invasion, there were several conversations featuring the Illuminati, the renegade Avengers of Luke Cage and others that mentioned that several recent cataclysmic events such as the Civil War, House of M etc. felt like somebody was systematically pulling the strings. It was suggested that these were part of the Skrull invasion plans.
I've recently started re-reading a lot of these famous story-arcs but can't seem to piece together if any (and if so, WHICH) key events (that served to trigger/fuel these famous events mentioned above) were actually orchestrated by the Skrulls with their genetic-clone body-snatcher replacements of our heroes?
Note that this is a purely a comics canon question. I'm not asking about the TV series adaptation.