@akushimon Well, you know how the Western saying goes, "If at first you don't succeed, gather the best (of the best) soldiers from all over the world and try again."
@akushimon The Western man is always restless, trying to discover, achieve, always aiming for something higher. "Per aspera ad astra."
"Through hardships to the stars"...
Speaking about this manga, though, the author obviously projects his eastern world view.
After like the 2nd failed attempt, the commander of the operation would have come with tanks, helicopter and a complete army, with any and every kind of heavy weaponry imaginable.
Sending five people as the 5th attempt is just batshit insane. It is a caricature of the western mindset.
I guess we could say that the last scene is roughly based on Deep Blue where the guy with some authority speaks up and put everyone at ease... just to get smashed/bitten in half as he was about to conclude his speech.