I'm libertarian conservative.
1) I'm libertarian on rights based issues (e.g., life, liberty, pursuit of happiness...speech, self-defense, religion, etc.), and
2) I'm "necessarian" on the most basic tasks for government (police, courts, military), and
3) I'm conservative on (a) discretionary issues of government (that is, most government spending beyond police, courts and military...which is to say, I prefer not to spend on such things, but if we must [and it seems we must] then spend in a conservative way) and (b) all issues of my personal lifestyle (e.g., Unlike liberals, I don't want my kids to be groomed for sexual activity in kindergarten.)
As far as foreign policy is concerned generally, and Russia and Ukraine are concerned specifically:
I hate intervention...but I also hate weakness and appeasement because both lead to war. If you want peace, prepare for war. I hate war, but if someone brings war to us (as happened on 9/11), then we need to respond majestically. I don't think putting a base in Saudi Arabia was an act of war.
Most conservatives support Ukraine, do they not?...at least morally, if not with weapons or boots on the ground. I don't think my support for Ukraine calls into question any conservative cred I may have, but if it does, then I suppose I will happily retreat to my libertarianism, because, as I say, my conservatism only regards discretionary issues anyway. I think sending weapons is a very inexpensive way to manage issues like this; I don't support military intervention in Ukraine by the US.