Isn't there photographic evidence of the U.S. peacekeepers being aggressive?
The Ominous Cannon
This photo, taken from hawaii-nation.org, was captioned:
Lili`uokalani is escorted by guards up the steps of the palace, where she was imprisoned after a cache of arms was found in her garden during the counterrevolution of 1895. (Hawai`i State Archives)
As you can plainly see from the image, the cannon in question is actually one of the palace defenses, pointing outward across the front of the palace steps.
It is also a picture from 1895, over a year after the U.S. peacekeepers returned to their ship by the order of Blount.