World War II: The <a href="https://en.wikipedia.org/wiki/Royal_Air_Force" id="mwATM" rel="mw:WikiLink" title="Royal Air Force">Royal Air Force</a> begins <a href="https://en.wikipedia.org/wiki/Operation_Hydra_(1943)" id="mwATQ" rel="mw:WikiLink" title="Operation Hydra (1943)">Operation Hydra</a>, the first air raid of the <a href="https://en.wikipedia.org/wiki/Operation_Crossbow" id="mwATU" rel="mw:WikiLink" title="Operation Crossbow">Operation Crossbow</a> <a href="https://en.wikipedia.org/wiki/Strategic_bombing_during_World_War_II" id="mwATY" rel="mw:WikiLink" title="Strategic bombing during World War II">strategic bombing campaign</a> against Germany's <a href="https://en.wikipedia.org/wiki/V-weapons" id="mwATc" rel="mw:WikiLink" title="V-weapons">V-weapon program</a>.