With the fall of France Britain became concerned for the continuation of its naval superiority. The French fleet, at harbour around the world would inevitably by used by Germany unless action was taken. French ships in British ports were seized, others received an ultimatum (see 3 July below). A British naval force sailed from Gibraltar to face down the most significant part of the French fleet at port at Mers-el-Kebir, Algeria. The resultant loss of life was regrettable but necessary move.
Whilst the Italian army in Libya continued to stall, in East Africa its forces made a move to secure the borders of Italian territory. As would happen in North Africa, however, the Italians overestimated the size of British opposition and failed to advance any further. It was a missed opportunity to move into the Sudan in force and threaten the Suez Canal from the south.