Irish History-The Battle Ax People
They moved in to the central valley of the Danube in the 3rd millennium came to be called the Battle Axe people (for their distinct shaft hole axes made of metal and stone that were found in their grave sites)
The battle Axe people were probably the first speakers of prototype Indo European, they were no doubt the first to use the wheel, and their method of burial, (under an earthen mound) is still used in some remote parts of Ireland to this day.
On the Iberian coast another group of people known as the Bell Peaks (because of the shape of the clay cups they used) flowed north, some going to the east fanning out over central Europe, others going westward to the British Isles and Ireland.
Some time around the 2nd century BC, these two people, the Battle Axe and the Bell peaks, merged in central Europe and gave rise to a new culture called the Unetician, named for the Crez village where traces of it were first unearthed. In turn, they launched the bronze age.