Bonds is Prologue VI of Fire Emblem: New Mystery of the Emblem.
Subjective: The following part of this article is based upon the editor's personal experiences and opinions, and therefore may not be applicable for all readers.
Using two sturdy units to block both bridges will prevent any unit from being overwhelmed as each unit potentially fights at least two battles each (an enemy melee and ranged unit). The player must be careful about either unit destroying too many units at a time, as it will result in more battles for a unit in a single enemy phase.
The Final Test