ff1cce19_Game_Manual___Achron_Wiki__Function
[Method] Time Travel [Description] Moving through or jumping through time [Function] 
If you move through time, currently selected units and buildings remain selected; any units that do not exist are deselected; returning to a point in time where the units exist does not reselect them; selection groups are for the most part achronal
Game Manual - Achron Wiki
Function