My Volunteer Army is Marching South!

I call them the Tiger Platoon.  The Tiger lilies in my yard, which I didn't plant, are slowly marching south.  What started as a few surprise volunteers a few years ago are now a lovely orange mass and I am quite happy about it.  They originated across the street in Harvey's yard.  They were his favorite flower.  The year after he entered a nursing home they sprung up in my yard and I consider them a gift from that lovely man.  March on Tiger Platoon!