"Aries has made a thread about increasing unit sizes to decrease the time."
I'd rather allow players to create multiple units and attack multiple targets.
When creating a unit there should be a text box (which could, for example, be at the bottom after weapons and ammunition and called "units") that multiplies everything to no limit, other than available weapons required. For example, instead of 850 tanks, you put 2 in that box and it creates 2 units, which would require 1700 tanks. If you have 1700 tanks, then 2 units are created.
When selecting targets to attack(before you hit the 'attack' button that brings up the window for attacking that target), there should be checkbox besides all targets of that type, along with a button at the top and bottom of the target lists that toggles all checkboxes, not unlike the corporate shares page.
After you have selected all or whichever targets you wish to attack, there should also be checkboxes beside units you have which are within range of at least one of the targets. They should not be required to be within range of all of the targets. Then, once you proceed to choose which weapons to attack with (for example, attacking with 2 divisions comprised only of 850 tanks each, would allow you to choose up to 1700 tanks), any weapons within range of targets will begin attacking the targets one at a time until either all attacks have been completed, or you have no more weapons/ammo to attack with. To not overload servers, there could be a delay between attacks (say for example, an attack every 1 or 10 milliseconds or even 1 second)
Really I am surprised it doesn't already work like this.. . but whatever. I guarantee there would be A LOT more warfare if a system like what I just laid out was put in place.
As it is now, I will probably only attack somebody if they have somehow considerably upset me, because it would require a lot of clicking, and I often have distractions when at my house. I wouldn't mind setting aside the time to make all those clicks, however, if as I said I was bothered enough by somebody than I would suck it up and click away (but I shouldn't have to do click so much. That is not fair to me or any other player, including my enemy!).
If I could simply use a checkbox system to create units and destroy targets just as we do with trading shares, I'd probably be among the more warmongering sorts around here.
It's still 'do-able' as it is now though, I guess. . .