Zephyrus
Tyrants and Slaves
Later in life, he also punished one of his legions that performed badly in battle by having every tenth man crucified. He then proceeded to name the legion "The Tenth," so they would always remember their blunder. They became one of his best legions..
Now you know where the word "decimation" comes from.
And don't forget the siege of Alesia where he besieged Vercingetorix and starved tens of thousands of men, women and children.