What is a pioneer?

“The word originally had a military connotation, relating to a soldier, though not an ordinary foot soldier. It connoted a military engineer, one who preceded the main body and built bridges, roads and trenches. Hence, “to pioneer” came to mean to prepare or open the way, and a “pioneer” was one who took the lead, forging ahead in the face of odds or opposition, as the early settlers of the North American West did. The term suggests an individual who is intrepid, one who presses ahead until his goal is realized. “