This is what the caption says:
“In case we sink…
Enroute to Eritrea – Italian Soldiers, in this exclusive photo, are given life-belt instruction on the forward deck of the S. S. Gange as it carried them towards Eritrea and the front lines of the Ethiopian conflict recently.”
Dated: 24 October 1935.
At 5:00 am on 3 October 1935, the Italian commander, General Emilio De Bono crossed the Mareb River and advanced into Ethiopia from Eritrea without a declaration of war.