A national convention was assembled for May 1787, to revise the Articles of Confederation. The problem of how to count slaves was a major issue. Southerners wanted slaves to count fully because it would increase the number of representatives allotted to slave-holding states. On the other hand, northern delegates wanted the slaves not to count at all. As they saw it, slaves were not free citizens, and were considered mere property by their masters. After a long deliberation Madison came to a compromise that counted slaves as three-fifths of a person.