Here’s what you’ll learn when you read this story:Researchers confirmed a total of six different fortified walls surrounding a network of oases in the northwest Arabian Desert. Researchers discovered that an Arabian Desert oases environment had a full network of walled fortifications over 4,000 years ago, not only showing off defensive insight, but also socioeconomic development of an expansive Arabian Peninsula civilization. A new study published in Antiquity confirmed four new walled oases coming as part of a network that now boasts six confirmed walled oases structures in the northwest Arabian complex. “The recent identification of a walled oases complex in northwest Saudi Arabia signals a radical shift in our understanding of the socioeconomic evolution of this vast, largely unexplored region,” the study authors wrote. The team used satellite imagery and then field visits to understand more about the newly confirmed walled structures.