1. Taiwan's two Dutch-built Zwaardvis class submarines took part in anti-submarine warfare exercises. 2. During World War I, unrestricted submarine warfare caused a shortage of tankers. 3. This warned Germany and Austria against intensifying the use of submarine warfare . 4. The most important shipboard advances were in the field of anti-submarine warfare . 5. The aircraft is also capable of being configured for anti-submarine warfare duties. 6. Like his German counterpart, Alfred von Tirpitz, Haus favored unrestricted submarine warfare . 7. The United States responded to unrestricted submarine warfare by severing executive order. 8. They plan to buy more anti-submarine warfare planes to strengthen Taiwan's sea defense. 9. :" We intend to begin on the first of February unrestricted submarine warfare . 10. These ships are designed for coastal patrol and inshore anti-submarine warfare .
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