It hijacks the default move command for groups of units and sends them in a square-like formation rather than all to one point (based on Group Move). In theory it should look like the below image although it does take a while for infantry to stick to their formation without being nudged by the engine (sure this can be improved with a better node choosing method).
I haven't really tested it with tanks or mixed units, in theory it should still be a bit less horrible than the default 'send everything to one point' behaviour but please feedback if they should be excluded or handled differently.
Changelog
v2 - Fixed a bug in the 'which node to use' calculation, means a lot less nudging
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