Battle where union forces fired on each other.

There are several battles where union forces fired on each other.  Some of these are below:
Wars of the Roses> this happens in 1471 when Lancastrian force under the Earl of Oxford was fired on Lancastrian cetre while returning.English Civil War> happens in 1643 hwen roundhead forces captured the royalist commander of Earl if KingstonAmerican Recolutionary WarNapoleonic Wars