Eddy del Rio
When the Civil War began, General Scott mustered him into the Union volunteer service. Commissioned major general of Pennsylvania volunteers, he was placed in command of the Department of Pennsylvania. In May of 1861, Patterson responded timidly and poorly to instructions from Scott to retake the US arsenal at Harpers Ferry. His failure to act effectively gave Confederates the opportunity to evacuate the arsenal, destroy the buildings and join the main Confederate army at Manassas. Scott ordered Patterson to be relieved of command. Patterson received an honorable discharge on July 27, 1861, only three months after he was commissioned.
So [if internet can be believed] it looks like Mr. Simonitch graciously gave Patterson a little longer to do something.