.gatestoneinstitute.org
formerly known as Saoradh

Massacre is an understatement. It's probably the worse civilian to combatant casualty ratio in modern warfare, and the second is far from it. They literally surrounded the city with artillery and tanks and bombarded it for a month, then entered the city and mopped up, killing anything that moved.
It wasn't a battle. They simply decided to destroy the whole city and kill everyone inside in order to kill the few hundred MBs in there.

My God, you're right! We're almost at the 35th anniversary of the Hama Massacre which started with the uprising of February 2, 1982 against the Assad Dynasty. Happy Anniversary!
Wikipedia tells us this:
Initial diplomatic reports from Western countries stated that 1,000 were killed.[3][4] Subsequent estimates vary, with the lower estimates claiming that at least 2,000 Syrian citizens were killed,[5] while others put the number at 20,000 (Robert Fisk),[1] or 40,000 (Syrian Human Rights Committee).[2][6] About 1,000 Syrian soldiers were killed during the operation and large parts of the old city were destroyed.
https://en.wikipedia.org/wiki/1982_Hama_massacre

Wow, only 456? The Syrians learned a lot about restraint in the last 35 years.