On classic rock During mid 70'

[Johndeckman9]

In the mid-1970s  (74, 76.) Can anyone guess the

Name of what American extremely popular based (Prog) Rock band was.

Hint:                    During there First or second released sold quarter of a million copies, and then with another album released about 2 years later, went on to receive substantial and excessive airplane on American Radio-(even still today.) And went on to achieve International  Success and worldwide success.  Also with their later recordings selling in excess over 3 million copies achieved multi-platinum success, Which puts them on the map in "Classic rock and music history forever"

[AlyssaPandora]

Hey, @Johndeckman9. 👋

Love this question! Would it be Kansas?

If not, could you share one more hint?! 

[MOHLovesAlaska]

@AlyssaPandora that is a great choice, here are my top two which happen to be theirs as well... “Carry On Wayward Son” and “Dust in the Wind” are classics that still resonate with many people today, including me...As far as the answer goes to the question of @Johndeckman9  I will say Led Zeppelin, I don't think there was another band more popular during that era... Their albums like “Physical Graffiti” (1975) and “Presence” (1976) were massive hits, and they had a huge following worldwide. Songs like “Stairway to Heaven,” “Kashmir,” and “Whole Lotta Love” became iconic and are still celebrated today. Anyway, that is my 2 cents worth...

Take care and GOD bless...