Limerick extension

A man who fought like a wildcat
Got injured in some unarmèd combat
He received an injection
But in the wrong direction
And lived out his years as a wombat.

There once was a man who extended the length of a limerick. This he defended
With gusto, asserting "Had it ended
Some lines heretofore
It would have meant war
The lines will continue
Lest the limerick devalue
And the economy therefore becomes upended.

(This type of limerick to be discontinued.)