It  is  possible to complete each mission in just one turn if you
select  the Imperial Fists division and choose the Heavy Weapon order.
This  enables  your  marines and the captain to move and fire twice in
the  same  round.  Choose  a  mission. Enter it and then on your first
round  of play initiate your Heavy Weapon order. Don't use your bolter
marines but move the rest of them twice and fire twice with all of the
squad. Click on any marine and all of his movement and fire orders are
restored  enabling  you  to  use  him again. This works for all of the
non-bolter  group  enabling  you to move fire and complete the mission
all  within  one turn and without any enemy getting the opportunity to
fire at you.