Star with a front. You want your battalions in stacks with unit types that compliment each other. Each hex takes seven units, so thats a start. Create 2x7 stacks of mechanized infantry and one stack of tanks and place in line. Now, bring some artilery and create a second line behind the first one. For every five arty battalions, add two infantry- create 3 such stacks to back up the first line. You've got a small land taskforce. Create two mixed stacks of 2xinf, 2xAT and 2xarty and place them a bit to the sides to cover flanks. Move a few supply trucks to the back. Get two fighters and two bombers, and allocate them nearby. Select all and create a battlegroup (ctrl 1 I think). So now you've got a very basic task force. Play around with the compositions and think of it as your basic block for army construction. It gets more interesting with air and navy, but it's a start. You can use the formation move command to keep the line structure you've created, so that the units do not attempt to pile o to a single hex when ordeted to move.
