What policy did Congress adopt that was proposed by John J. Crittenden of Kentucky? What was required of northern military commanders?

Crittenden Compromise

Explanation:

made up of six proposed constitutional amendments and four proposed Congressional resolutions that he was hpoing would appease Southern states and help the nation avoid a civil war. 

support by the South and not by the North, it was a failure.

the commander in chief

he government should regulate the economy