Reducing Doubling of Files

Command:
"Half-files, face about to the left/right and march forth to your places"

Those soldiers who had formed the second line for the doubling turn 180^o and return to their original places that constituted the original file.  Note the soldier in red who was in front of the soldier in blue in the second line is still in front of the soldier in blue after the file is back as it was.  Last but not least, after reducing, all in the file face the same direction as their File Leader.