[126][o] On September 2, Grant arrived at Cairo, Illinois, assumed command by replacing Colonel Oglesby, and set up his headquarters to plan a campaign down the Mississippi, and up the Tennessee and Cumberland rivers.[128] After the Confederates moved into western Kentucky, taking Columbus,[129] with designs on southern Illinois, Grant, after notifying Frémont, and without waiting further for his reply, strategically advanced on Paducah, Kentucky, taking it without a fight on September 6.[130] Having understood the importance to Lincoln about Kentucky's neutrality, Grant assured its citizens, "I have come among you not as your enemy, but as your friend."[131] On November 1, Frémont ordered Grant to "make demonstrations" against the Confederates on both sides of the Mississippi, but prohibited him from attacking the enemy.