On this day in military history…

• 1918 Germany launched its hardest hitting and last air raid of WW1 against the UK killing 49 people and injuring 177.
• 1940  German army in northern France reaches Abbeville severing all communications between British expeditionary force and French army in the south .
• 1969 the last day of the battle of Hamburger hill and possibly the last major ground offensive by American combat troops in Vietnam.