Quote Originally Posted by The Glyphstone View Post
It's not quite that bad, because Space Marine training requires them to first go through training as Assault Marines, then Devastators, before becoming all-round Tactical Marines. So all the chapter's TacMarines are also prepared to snatch up and use a heavy weapon; the limiter is the number of heavy weapons available for them to use, rather than the people trained in their usage. It's very much a Russian Army situation.
Wait. So the order of experience is:

Initiate/Scout --> Assault --> Devastator --> Tactical --> Terminator?

Kind of explains why Thaddeus was the youngster in DoW2