Is there a function that allows you to line up objects that you use a brush to place on your map?

I'm laying down some outer city walls using a brush pattern of the wall sections. But I can't seem to get the sections to line up evenly. I have tried to zoom in for a better view but every time I brush in a new section its offset.
Do I need to brush it in and then keep adjusting its placement?
Guess I'm asking if there is an easier way, kind of like a align to path option.
Thanks
Allan