How so when the force doesn't affect extra galactic life? In an all out war between both galaxies Halo wins. Production time: takes the empire 1 year to fully build a Death Star. The forerunners can strip mine an earth size planet and use the materials to create 1 Halo ring every 9 days. Ship building: Star Wars takes several months to construct 2 star destroyer. Forerunners can grow (yes grow) a dreadnought class vessel (one of the smallest being the Dicdacts ship the mantles approach) larger then the Death Star in just a couple of days. Single fighters: takes the empire approximately two months to build a squadron of Tie fighters. The Forerunners can create single attack vessels in minutes literally by the thousands. (Even in small groups these have enough firepower to vaporise cities and upturn continents) Droid fighters: Star Wars can produce droid armies in a short space of time around 5,000 units per day per factory. The forerunners have a sentinel class whose shields and weapons double with each with each sentinel that combines to the group. A squad of 50 (each around 4ft long and 2 ft high) can one shot a covenant flagship with full shields from stem to stern. These can be created at rate of 1 every 6 seconds. Constraint fields: a technology based version of the force. Promethean's and Armigers full composed of hard light and having sophisticated A.I programming they can also do short slipspace jumps to appear behind enemies/obstacles created in the thousands. Now add ancient humanity and the san'shyum whom were at the same technological level as the Forerunners except in slipsace engineering and you now have 3 highly advanced races creating trillions of units per month (if not weeks) with no loss of a single life as the forerunners humans and other species retreat to shield worlds contained in slipspace controlling a vast automated army of hard light and death.