Yeah, the "Select assault mission" action brings up the map and shows all objectives currently being attacked/defended by showing a colored square over that area. When you click on an objective you are then inserted into a squad that is attacking/defending that objective. The "Halo insertion" action allows you to click on the map which will then transport you 2km into the air above that area. It also stores your backpack and gives you a parachute. Once you hit the ground you are given back your original backpack and all items inside.
On another note, updated both missions with a slight improvement to the halo jump script and the display of actions at base.