What did the new dynasty do differently with the great wall of china

Built over Four Periods of Time. After the demise of the Qin Dynasty (221BC-207BC), the Han Dynasty was established. It was a unified regime, but was still threatened by the northern Huns. ... At the same time, the Great Wall was erected along the northern borders over four periods of time.

for starters, there is the structural trend of rising primary government expenditure as a share of gdp, which reached 36% in 2014, up from 22% in 1991. this increase reflected a political desire to address the poverty and inequality that had gone unaddressed during previous decades. to support the increase, brazil’s government increased taxes on consumption and promoted progress toward labor-market formalization. nonetheless, public investment, particularly in infrastructure, took a hit. in fact, with the exception of the 2005-2008 period, total investment as a share of gdp has remained below 20% since 1991.

answer; /// i do believe that its napolean's conquest of spain;