Could be cheaper to wage war from space under certain circumstances. Some earth bound city giving you lip? Put a little ion engine a telephone pole sized rod of

Could be cheaper to wage war from space under certain circumstances. Some earth bound city giving you lip? Put a little ion engine a telephone pole sized rod of tungsten. Bye bye city. Industrially, building such a weapon for a spacefaring society is quite a bit cheaper than the equivalent terrestrial solution (nukes most of the time).