Valkyria Chronicles - Select Rosie, and have her take out one of the troopers that is close to her. Be sure to leave her crouched in the ditch at the top of the ramp. If there are no enemies left, you can run her to the South East base.

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Select Rosie, and have her take out one of the troopers that is close to her.  Be sure to leave her crouched in the ditch at the top of the ramp.  
If there are no enemies left, you can run her to the South East base.