Comment by thelastgallon

There are a few one man army like this.

Dashrath Manjhi is best known for carving a 110-metre-long (360 ft), 9.1-metre-wide (30 ft), and 7.7-metre-deep (25 ft) path through a ridge of hills using only a hammer and a chisel, because his wife fell and died from injuries due to the ridge blocking easy access to a nearby hospital on time: https://en.wikipedia.org/wiki/Dashrath_Manjhi