As another point of reference:
In the NATOPS for the SH-60B and CH-53E (both out of date copies), both aircraft are prohibited from aerobatic maneuvers.
The 53E (which I think we will all agree is a very capable combat aircraft) is limited to +0.5 to +2.0 gs.
We all need to be careful when interpreting flight manual limitations as a pure indicator of whether an aircraft can accomplish its combat mission.