Yes, mistakes can happen.

But when you use autonomous targeting systems (with "human oversight" in theory) and tell your soldiers:

"no stupid rules of engagement,” “no politically correct wars,” and “no nation-building quagmire.” (Hegseth)

And the top commander says that he would intentionally kill the families of terrorists if voted into power:

https://edition.cnn.com/2015/12/02/politics/donald-trump-ter...

Then at some point I do not believe the term "mistake" is appropriate here.