Question: After so many years

[Roman]

For years game and always learn something from this game. I really costs a lot because I do not speak English well. This adds another difficulty is that I am ignorant of military terminology.
One recent thread I learned the difference between fighter bombers and attacks grounds.
Where I can find something where they learn about weapons, ammunition etc?

Now I have two questions:

1) How is called artillery ammunition destroying vehicles and tanks? FH?
2) HE ammo is more powerful cannon artillery assault that hint? And assault guns are more apt to destroy bunkers?

I just know that I know nothing .....