There had been a mistake regarding the makeup of the East African Response Force (EARF) when this had been discussed here on the 18th. While news outlets had mentioned that 1st Battalion, 63d Armor Regiment from the 2nd Brigade Combat Team, 1st Infantry Division had deployed earlier in the year, it was in fact 1st Battalion, 18th Infantry Regiment that formed the core of the EARF when elements deployed to South Sudan.
In the spring, 1-63d Armor had deployed to Djibouti as part of the formation of the rotational EARF as the first battalion to deploy in support of the new mission. 2/1st Infantry is aligned with US Africa Command (AFRICOM) currently. On December 14th, a ceremony was held to mark the relief in place transfer of authority between 1-63d Armor and 1-18th Infantry, which is also part of 2/1st Infantry.
A correction has also been appended to the original story here on Codebook: Africa.