Reconnaissance: use your mouse to place units (click and drag to rotate). 
Fight: click on unit or flag to select, point and click where to move.
Also you can use keyboard keys 1-8 to select squad.

TIPS:
- You squad will become bigger each level.
- If your squad is dead – it will get only 1/4 of experience points.
- If you cannot complete level, try to replay previous and get money for upgrades.
- If you are replaying level than have been won already, you will get no experience for squads.
- You get gold medal if all of your squad are alive after finished mision. Silver – if one squad is dead. More dead squads means bronse.
- Better medal brings better money for you.