From an Epistle Issued by Yearly Meeting 1854, during the Crimean War:

We feel bound explicitly to avow our continued unshaken persuasion that all war is utterly incompatible with the plain precepts of our Divine Lord and Lawgiver, and with the whole spirit and tenor of His Gospel; and that no plea of necessity or of policy, however urgent or peculiar, can avail to release either individuals or nations from the paramount allegiance which they owe unto Him who hath said 'Love your enemies.