Hi Historians,
I'm writing to ask for a rigorous treatment on a peculiar theory I heard from a reasonably trusty source.
The claim is that the Great Wall of China was actually used as a gimmick for Chinese expansion in the West(i.e., Gansu, Shaanxi, etc.). According to this theory, the great wall was actually a tool of offensive colonization. Every new construction of the wall would provoke attacks from neighboring tribes, which was used as justification for a war to annex/subdue China's neighbors. Then they would have to expand the wall to include the new territory, leading to new wars, etc.
Any truth at all to this?
What exactly is the source? The theory is rather convoluted for a process of expansion that took place over thousands of years, especially when there are many other, simpler theories that explain the system of walls.