Spawn attackable units in sandbox mode.

[Neutrino]

If I use the ALT-F2 menu to spawn units in sandbox mode I am unable to attack them, how do I spawn stuff that I can attack?

[ZLO_RD]

as far as i know, you MUST have enemy civilians or other opponent (AI) that is not your ally

after opening cheat menu (alt+F2) go to enemy (civs or ai or other player) veiw (double click on player/enemy witch view you want to enter, they are on top or top-right of cheat menu)

Then you spawn whatever you want and it will belong to that enemy
and only then you can go back to your view and attack those units with your own units

[Resin_Smoker]

Dude just play with your mom as she'll always let you win.

Hell she lets me win! (Sarc)

Resin

[da_monstr]

I believe you need to select a map with hostile civilians on it. Or just spawn an AI in one of the other spots and kill it off before it starts building.