President Lincoln summoned 75,000 militia on 15 April 1861 to suppress the insurrection , a call which was limited by law to 90 days .
Which was rejected by several slaveholding states which had not seceded .
President Lincoln summoned 75,000 militia on 15 April 1861 to suppress the insurrection , a call which was limited by law to 90 days and which was rejected by several slaveholding states which had not seceded .