Place soldiers around the enemy's path in an attempt to ambush and kill them. Strategically give the order to fire so that your units attack strongest as a group. Unlock new units and upgrade them after each successful battle.
Head out onto the streets and raise money to help save the forest! Approach strangers and choose the right things to say to be persuasive and informative without being too pushy or forceful. Raise enough money each day or risk being fired.