D&C 45

As the Savior closes out His revelation concerning the signs of the times, He said -

"And it shall come to pass among the wicked, that every man that will not take his sword against his neighbor must needs flee unto Zion for safety.
69 And there shall be gathered unto it out of every nation under heaven; and it shall be the only people that shall not be at war one with another.
70 And it shall be said among the wicked: Let us not go up to battle against Zion, for the inhabitants of Zion are terrible; wherefore we cannot stand."  (Doctrine and Covenants 45:68–70)

Though our first impressions may be of a physical war...which it may, I couldn't help this morning to think of it as a spiritual war much like the pre-mortal war in heaven.  Safety will only come as we flee wickedness and live according to the laws of Zion.