＞But Watson said the combination of surveillance techniques,
＞the passage of new anti-terrorism laws "specifically designed to condemn Sea Shepherd tactics,"
＞and a threat by Japan to send military vessels to defend whalers was too much.

military vessels = 軍用艦だろ
battleship とは書いてないぞ

cnn元記事:
http://edition.cnn.com/2017/08/29/asia/japan-whaling-sea-shepherd/index.html