Advance Wars 2: Black Hole Rising/Cleanup

This mission is mainly a tutorial and an S-Rank is very easy to achieve.

Day 1
You start off with 3 infantry and 1 APC. First Move all 3 Infantry units 3 spaces to the east

Day 2
Move the 3 Infantry East 3 spaces again

Day 3
Move the bottom infantry east 3 spaces and attack the infantry, move the middle one second, then the top one

Day 4
Attack with the top then the bottom infantry unit and you will win.

Reward
300 points and an S-Rank