SAMNITE WARS
343 BC - 290 BC

There were three major conflicts between the Romans and the Samnites:
 

First Samnite War
343 BC - 341 BC

Second Samnite War
(also called Great Samnite War)
327 BC - 304 BC

Third Samnite War
298 BC - 290 BC

And here is the map of Samnium:

SAMNIUM IN ANCIENT ITALY
Click map to enlarge

MORE ON THE SAMNITE WARS

First Samnite War - 343 BC - 341 BC
The Samnites lost and Rome annexed Campania (think Naples), the territory with the orange border on the map.

After the defeat of the Samnites in the First Samnite War, their  neighbor Latium felt sandwiched by the Romans. See map: Latium is the territory with the pink border. Rome was on the roll and, as the result of the Latin War (340 BC - 338 BC), annexed Latium as well. 

Second Samnite War - 327 BC - 304 BC
The Second Samnite War is also called the Great Samnite War. Rome won again.

The Battle of Caudine Forks in 321 BC was part of this war. Rome lost the battle and bribed historians to forget about it.

Third Samnite War - 298 BC - 290 BC
Third war and third victory for Rome. The Battle of Sentinum in 295 BC was part of this war. Rome won the battle, defeating an alliance of Samnites and Gauls.