Some tips to play Starcraft 2 as a better way
Highlight your Marine Unit and go until you get two Dominion Marines thus you'll become familiar with brief tutorial of how to attack & destroy the enemy opponents.
Get this right from beginning and do it properly to move on in a good position otherwise you'll be facing disaster.
If you take it wrong by thinking you know a better route then you could have a challenge with moving on to the next phase.
b) Do not head north up road where you'll get Dominion Holoboard and will have a new Bonus Objective to destroy 6 out of 6 Holoboards because;
c) Remember to play as a team because reinforcements will fly down to ground in the middle of the Dominion Marines group and start attacking.