Rear springs

[BigScott]

A little research helped me find that the military wrap allows a secondary leaf to act as a main leaf if in case the main leaf fails. Thus, allowing your spring pack to stay attached. Basically, a limp mode.

Nationals run 2 main leafs, I am sure Deaver does the same. Military wrap is a 3rd wrap around the main front piviot point that only extends to the axle.
You are correct, added strength