In no way can 100 men cover several square kilometers of terrain in anything close to an effective manner. That's roughly a company sized unit, and they "might"

In no way can 100 men cover several square kilometers of terrain in anything close to an effective manner. That's roughly a company sized unit, and they "might" be able to have a 800m frontage, but that depends on how they're equipped. If they're light infantry with limited transportation, not a chance.