The metal tips were fitted hot and glued with berberine. For the berberin glue, I collected birch bark for hours in a wetland. The distillate becomes mixed with charcoal.
This composite adhesive early humans does not lose its adhesive power or elasticity. Our ancestors used this nature glue to attach their arrowheads.
I suppose birch bark glue was an intercontinental bestseller. Even the Egyptian chariots were sometimes glued make some with Berberin. Not a few components of this high end warrior chariots consist made of European wood.
The Romans also loved him. They import the idea from the Nile area. the Roman legionaries certain will have been astonished when they came into conflict with the Celtic prototypes on European soil. And that was a thousand years later. Now however some other weapons have been adapted.
The oldest depictions of the two-wheeled war machine can be found on Nordic rock carvings. All fittings such as cast handles and wheel hubs have been excavated and coincide in terms of time and technology with that of the Egyptian Empire. Except that the Egyptians knew no bronze and used hardened copper.