During his second reign over these territories, he is remembered for assuming the role of High Commissioner to Vichy France.
These attitudes significantly aroused negative French public sentiment after the war until his death.
As such, Boisson's legacy is significantly tainted by his decision to surrender French colonial control to Vichy administrative forces.
Over the next twelve years, he spent his career working in various African posting within the French colonies.
On 5 June 1941, it was reported by the Glasgow Herald that he was to be awarded the "Order of the Nation for the defense of Dakar against de Gaullists by Petain personally".