In 1969 Arnaud returned to Chad as commander of Opération Bison, a military operation that had to contain the menace represented to the Chadian government by the FROLINAT rebels; but tensions with the Chadian President brought to his replacement just a few months after his arrival.
In 1969, Arnaud returned to Chad as commander of Operation Bison, a military operation aimed at addressing the threat posed by FROLINAT rebels to the Chadian government; however, tensions with the Chadian President led to his replacement just a few months after his arrival.