- "I'll meet you at our secret base in Sector Four."
- ―Grievous, to the crew of the Malevolence
Sector 4 was the theater of operations of the Republic 4th Sector Army during the Clone Wars. After the Declaration of a New Order, it was reorganized in an Imperial Priority Sector and placed under the rule of Grand Moff Praji.
Around 22 BBY, the Confederacy of Independent Systems built a secret base in the sector. The Confederate General Grievous planned to retreat and meet his warship, the Malevolence, at the base, but the warship was destroyed before it could reach the base.