Operation Crossbow, the airborne offensive against V-1 rocket sites, commenced. It would go on until the end of the war.
Italian Jews interned for the first time at Fossoli di Carpi.
By Fondazionefossoli - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=4089375
The facility had originally been a POW camp. It would only be a staging area for the deportation of Italian Jews to the German Holocaust machine, not a permanent concentration camp to house them.
The Battle of Sio commenced on New Guinea.
Calcutta was bombed during the day by the Japanese for the first time.