Thousands of South Sudanese government soldiers are heavily deployed in Lobonok, Yei, Kajo-Keji, and Aru Junction to counter the operations of the National Salvation front (NAS) in those locations.  
Occurred in Juba South sudan, South Sudan on August 26, 2020, at 10:41 PM
Reported by JJ via SMS on August 27, 2020, at 10:30 AM in Odobu, Uganda
Also heard by 5 other(s)

This rumour is probably true and is of high priority – here's why:
The National Salvation Front (NAS) has said its warriors must observe a state of maximum readiness to defend themselves and civilians after the government in Juba ordered all military divisions in the country to contribute troops for what is believed to be imminent aggression agsint NAS defensive positions.

Further details are available at this link:

This heatmap depicts the spread of rumours over time. Hotter areas of the map denote earlier sightings, while cooler areas indicate delayed dispersion.

Location Reported by Via Date
Odobu, Uganda JJ SMS 27-Aug-2020 @ 10:30 AM
Ocea A, Uganda JJ Walk-in / in person 27-Aug-2020 @ 10:10 AM
Omugo 6, Uganda JJ Walk-in / in person 27-Aug-2020 @ 9:05 AM
Eden, Uganda JJ Walk-in / in person 27-Aug-2020 @ 8:15 AM
Ofua 1, Uganda JJ Voice / telephone 27-Aug-2020 @ 7:10 AM
Rhino Camp Refugees settlement, South Sudan anonymous Voice / telephone 26-Aug-2020 @ 10:43 PM
August 27, 2020 | 3:19 AM | JJ
August 24, 2020 (JUBA) - South Sudan People’s Defense Forces (SSPDF) are building up troops and preparing for an imminent offensive on the positions of the National Salvation Front (NAS) said the holdout group on Monday.
This link has the details,