Chaos: As you don't have a recon, you won't know this, and Sandoz might have opted to barricade his hq with 2 bombs and dispensed with the 3s! :) But yes, you are right, I ought to replace it with a 5.
Perhaps a minimum of 5 movable pieces must be chosen, and a general cannot be selected unless you have the one below it. So if you went for 5 pieces, you could choose 1x1, 1x2, 1x3, 1x4, 1x5, or perhaps 1xRecon, 1x1, 1x2, 1x3, 1x4 or even 1xRecon, 1xSab, 1x1, 1x2, 1x3.
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)