Before the Roman takeover of this region, in Julius Caesar's commentary, the tribal boundaries in the area where the Texandri are later found are left unclear. He described it as thorny low forest and marshy lowlands, northwards of the main populations of the "cisrhenane Germani" and "Nervii". Caesar mentions both these politically important tribes retreating into such northern estuarine areas when threatened, but more clearly connects those regions to the Menapii, who in Caesar's time, as opposed to Strabo's, stretched through the delta all the way to the Rhine. At one point Caesar specifically says that the cisrhenane "Germani" bordering the Menapii were the Eburones, who he describes as the biggest and most important tribe of the "Germani".