Eight Union sailors were killed and 44 were wounded while the Confederates lost none. (Captain Joseph Dixon of the river batteries had been killed the previous day during "Carondelet"'s bombardment.) On land the well-armed Union soldiers surrounded the Confederates, while the Union boats, although damaged, still controlled the river. Grant realized that any success at Fort Donelson would have to be carried by the army without strong naval support, and he wired Halleck that he might have to resort to a siege.