"The United States had its own civil war crisis that threatened to destroy the nation. President Abraham Lincoln, sensing the critical need for God's help, proclaimed a national day of fasting with these words...
'We have been the recipients of the choicest bounties of heaven. We have been preserved, these many years, in peace and prosperity. We have grown in numbers, wealth and power, as no other nation has ever grown. But we have forgotten God. We have forgotten the gracious hand which preserved us in peace, and multiplied and enriched and strengthened us; and we have vainly imagined, in the deceitfulness of our hearts, that all these blessings were produced by some superior wisdom and virtue of our own. Intoxicated with unbroken success, we have become too self-sufficient to feel the necessity of redeeming and preserving grace, too proud to pray to the God who made us! It behooves us, then to humble ourselves before the offended power, to confess our national sins, and to pray for clemency and forgiveness.'" (From The Rebirth of America. The Arthur S. DeMoss Foundation, page 151.)
(Both quotes taken from Supernatural Prayer and Fasting by Richard Booker, page 162.)