I never wanted to invade

I never wanted to invade
The forest of a friend.
I never meant to plant myself
Beyond where I might end.

But there it was I wandered in
And seized a wild field,
And turned its berries into corn,
And took what it would yield.

Years later, we would often walk
Out to the boundary line,
And picnic where the fence once stood
That marked off what was mine.