Gee.
And to think we couldn’t build a transcontinental railroad using picks, shovels, and black powder. We couldn’t build the Eire Canal, Panama Canal, and the French couldn’t build the Suez canal.
Bet we couldn’t have won WWII either.
Bumping to the MOON, sir!
And the Indians didn’t build a 2500 mile wall between India and Bangladesh.
Nor are they building one between themselves and Pakistan.
Nor are they building one between India and Myanmar.
Nor does Israel have 450 mile wall between Israel and Pakistan
The total length of the Great Wall of China building in different dynasties is 13,170.69 miles (21,196.18 kilometers), announced by China’s State Administration of Cultural Relics in 2012. The length of the Great Wall of Ming Dynasty (1368-1644) was 5,500.3 miles (8,851.8 kilometers) from Hushan in Liaoning to Jiayuguan Pass in Gansu on April 18 in 2009.