First I will make clear that there are two distinctive peace positions.
Pacificism is the most common peace position worldwide. It is a position that does seek to use whatever nonviolent power is available to achieve its agenda. Through pacificism you'll find the protests, the marches, the hunger strikes etc.
Historically the anabaptists have held to what is commonly called "non-resistance"(NR). This comes from the "resist not evil" passage and has plenty of scriptural support. A terrific book is "War, Peace, and Non-Resistance" by Guy Hershberger. NR does not seek to wield power to force its agenda upon others, but rather to peacefully live amongst all men. It traditionally is not nationalistic, realizing that God appoints the power that is. Paul speaks of the legitimacy of Nero's rule in Romans 13, and the NR understands that even when a ruler is seemingly evil that ruler is still appointed by God and we submit to that ruler, even if it means death. (Understand that submission does not mean obedience).
So the difference between NR & Pacifism is great. An example I've used for years: If drafted an NR would go to the draft board, humbly submit to their authority and say "I cannot serve in your military~do with me what you must". A pacifist may do that also, but may also picket/protest the board's authority to draft or run off to Canada~and it would be accepted as legitimate pacifist actions. For a NR to not submit to the gov't would be not submitting to God. Again understand here the difference~submit means to place one's self under the authority of another. While I disobey the draft order, I submit willingly to the punishment of not doing so.
The submission and power aspects are the key differences between the pacifist and nonresistant. I have been and still hold to many non-resistant principles; I've never been pacifist.
There are Christians that do hold to genuine pacifist principles~it's better to let them explain.