After the five groups of the Silva family had split up as soon as they had entered the territory of the Black Plain, each of those teams had followed their respective destinations.
One group had gone to the northeast of that territory, where the Gill family forces had wiped them out. Another group had reached their destination almost at the same time as the late Margot's team since the southeast region was a similar distance away as the northeast.
But luckily for this group, they had not faced the same outcome as Margot's group and, as such, were still investigating that part of the Black Plain.
On the other hand, the groups responsible for this territory's northwestern and southwestern parts had not yet reached their respective destinations. After all, those parts of the Black Plain were at greater distances from where they came from.