Following a hurried shakedown cruise along the Atlantic coast in the spring of 1942, Juneau assumed blockade patrol in early May off Martinique and Guadeloupe Islands to prevent the escape of Vichy French Naval units.he was down 12 ft (4 m) by the bow, but able to maintain 13 kn (15 mph, 24 km/h). A few minutes after 1100, two torpedoes were launched from I-26. These were intended for San Francisco, but both passed ahead of her. One struck Juneau in the same place that had been hit during the battle.