MAINLINE PROTESTANT: Zwinglian

And they that understand among the people shall instruct many: yet they shall fall by the sword,....

Daniel 11:33

Zwingli himself "fell by the sword" during the Reformation. 

Zwingli taught a sort of compromise between Lutheran "Free Will" and Calvin's "Preservation of the saints" by teaching "Eternal Security" once you come to God.

The Swiss Brethren Churches haven't really been active in America due to the fact of their independence within each of their home districts in Switzerland. 

The only real Zwinglian Church here would be the Apostolic Christian Church---but it has been heavily influenced by Anabaptist Mennonites and therefore leans towards Lutheran Free Will and stress piety in lifestyle. In more modern times they have also adopted the tongues of the Charismatic movement.

Apostolic Christian Church (Conservative--practices "holy kiss" between brethren)

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***Apostolic Christian Church Nazarean (Stricter Piety)