Commander (Easy) is the final stage in Duel on the Prairie.
Cat Deploy Limit: 1
Le'boin spawns as the first wave.
Kang Roo spawns as the second wave.
One Horn spawns as the last wave.
Assassin Bear spawns after 15 minutes.
Since the Unit Deploy Limit is only 1, it is recommended that you use cats that dish out a lot of damage per hit like Cancan cat for the slow-attacking Le'boin, Kang Roo and finally, One horn. You need to beat this stage under 15 minutes or an Assassin Bear will spawn and destroy your base.