works on the Tennessee were called Fort Heiman and Fort Henry, and that
on the Cumberland was Fort Donelson. At these points the two rivers
approached within eleven miles of each other. The lines of rifle pits
at each place extended back from the water at least two miles, so that
the garrisons were in reality only seven miles apart. These positions
were of immense importance to the enemy; and of course correspondingly
important for us to possess ourselves of. With Fort Henry in our hands
we had a navigable stream open to us up to Muscle Shoals, in Alabama.
The Memphis and Charleston Railroad strikes the Tennessee at Eastport,
Mississippi, and follows close to the banks of the river up to the
shoals. This road, of vast importance to the enemy, would cease to be
of use to them for through traffic the moment Fort Henry became ours.
Fort Donelson was the gate to Nashville--a place of great military and
political importance--and to a rich country extending far east in
Kentucky. These two points in our possession the enemy would
necessarily be thrown back to the Memphis and Charleston road, or to the
boundary of the cotton states, and, as before stated, that road would be
lost to them for through communication.

The designation of my command had been changed after Halleck's arrival,
from the District of South-east Missouri to the District of Cairo, and
the small district commanded by General C. F. Smith, embracing the
mouths of the Tennessee and Cumberland rivers, had been added to my
jurisdiction. Early in January, 1862, I was directed by General
McClellan, through my department commander, to make a reconnoissance in
favor of Brigadier-General Don Carlos Buell, who commanded the
Department of the Ohio, with headquarters at Louisville, and who was
confronting General S. B. Buckner with a larger Confederate force at
Bowling Green. It was supposed that Buell was about to make some move
against the enemy, and my demonstration was intended to prevent the