In a surprising number of conflicts, propagandists have accused enemy troops of very similar (and appalling) atrocities. Among the most common allegations are claims that babies had been impaled on swords, spears, pikes, or bayonets, and that fetuses had been sliced from the bellies of pregnant women.
Some examples of groups being accused of these activities throughout history:
Irish Catholic forces in the Rebellion of 1641:
The Irish rebels were also accused of cutting fetuses from women's bodies, as a modern historian says here:
One of the iconic narratives that comes up in hearsay evidence is reports of atrocities against pregnant women who were said to have been ripped open, had their babies pulled out and beaten against rocks.
Ottoman Turk troops in Bulgaria in 1876:
The number of children killed in these massacres is something enormous. They were often spitted on bayonets, and we have several stories from eye—witnesses who saw little babes carried about the streets, both here and at Otluk—kui, on the point of bayonets... Here in Batak the Bashi—Bazouks... ripped open pregnant women, and killed the unborn infants.
German troops in Belgium at the beginning of World War I:
Again, the allegations of bayoneted babies was accompanied by claims of pregnant women being cut open and their fetuses removed:
The Bavarians came into the village of Nomery, after chasing the French and the inhabitants away, they abducted a young pregnant woman, opened her belly and threw the child on the dung heap; since the mother was still living, they finished her off.
I've found many other instances of atrocity propaganda making these claims, but the examples above are sufficient to illustrate what I'm talking about.
As far as I've been able to determine, none of the accusations above are considered to be accurate by modern scholars.