 Complete the following phrase:  After the fall of France in June 1940, Japanese pressure on the Vichy authorities in French Indochina resulted in the granting of base and transit rights, albeit with significant restrictions. Despite this, in September 1940, the Japanese launched an invasion of that country. The bases thus acquired in Indochina allowed extended Japanese air cover of the invasion forces bound for Malaya and for the Dutch East Indies. In these circumstances, Prince of Wales and Repulse, which were dispatched to intercept the invasion force, were vulnerable to concerted air attacks from the Japanese bases in Indochina and, without their own air cover, they were 