It's a British (really: Commonwealth) war memorial that is ubiquitous in Commonwealth war cemeteries. There's one at Arlington National Cemetery as well.
This is all there was about the memorial itself:
The Cross of Sacrifice was designed by Sir Reginald Blomfield for the Imperial War Graves Commission (now Commonwealth War Graves Commission) and is usually present in Commonwealth war cemeteries containing 40 or more graves. It is normally a freestanding four point limestone Latin cross in one of three sizes ranging in height from 18 to 32 feet. On the face of the cross is a bronze broadsword, blade down. It is usually mounted on an octagonal base. The Cross represents the faith of the majority of the dead and the sword represents the military character of the cemetery. The Cross of Sacrifice is frequently built into the boundary wall of cemeteries where subsidence is a liability, such as those in Turkey.Nothing about why it was created, what the design process was, where it was located, nothing. The memorial's height is barely mentioned, and nothing about its construction features.
That's crazy shit. The original article had three times as much text about places where the memorial appeared (e.g., non-war cemeteries) than it did about the memorial itself! That's nonsense!!
I'm slowly laboring to create an article about all major memorials at Arlington National Cemetery. I lay down that burden occasionally, because my brain needs a rest. I figured that there was no need for a Canadian Cross of Sacrifice article, becuase there already was one about the Cross of Sacrifice itself. But boy was I wrong...
Although I knew NOTHING -- NOTH-ING -- about British war memorials or Commonwealth war graves, I spent four days doing some heavy research and writing.
It's better now.