strike on something formal
strike upon something formal

I was struck on the head and remember nothing more.

At the same time something struck him on the back of the head.

Another strong struck almost exactly the same area four years later on May 8, 2003.

There was only a man who still looked as if he'd been struck on the head.

He followed her inside, where she turned and struck him on the face.

Then, suddenly, something struck him on the back of the head.

Over time, though, agreement was struck on a number of issues.

How many people were struck, say, on a given day?

Before he reached his chair, something struck him on the head.

He went back to the first in the line and struck him on the chest.