In the American Revolutionary War, the British were fighting for themselves against the Americans and, further into the war, the French.
Civilization in each region developed advance math,science, and engineering.
Automotive was a huge development in 1950s and was important because it was a area we were slacking on.
Neither one of the sides were fruitful in getting through the resistance of the other and bringing about a stalemate. Trench fighting developed due the disappointment of the Schliffen Plan. It was another arrangement of fighting which was an immediate reason for the stalemate, and this is the reason. It was an arrangement of resistance not offense.