1.0JeopardyAnswers.orghttps://jeopardyanswers.orgjeohttps://jeopardyanswers.org/author/jeo/During World War II U-boats improved these weapons from the G7a model which left a trail of bubbles as it headed for its prey - JeopardyAnswers.orgrich600338<blockquote class="wp-embedded-content" data-secret="051dSUp0Dc"><a href="https://jeopardyanswers.org/during-world-war-ii-u-boats-improved-these-weapons-from-the-g7a-model-which-left-a-trail-of-bubbles-as-it-headed-for-its-prey/">During World War II U-boats improved these weapons from the G7a model which left a trail of bubbles as it headed for its prey</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://jeopardyanswers.org/during-world-war-ii-u-boats-improved-these-weapons-from-the-g7a-model-which-left-a-trail-of-bubbles-as-it-headed-for-its-prey/embed/#?secret=051dSUp0Dc" width="600" height="338" title="“During World War II U-boats improved these weapons from the G7a model which left a trail of bubbles as it headed for its prey” — JeopardyAnswers.org" data-secret="051dSUp0Dc" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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