Valkyrie is an ancient viking superstition. When brave Norsemen fell in battle (often raiding parties) these hotties with their mammoth shields would appear on winged horses and tote off the fallen to heathen heaven - Valhalla.
Despite oathbreaking, defacing images of gods and wickedness in general - all would be forgiven by success in combat - especially if the offender died a heroic saga inspiring death.
Claus Schenk was a real European blue blood aristocrat. Awarded nobility back in the Holy Roman Empire days ( funny though - HRE was a triple no go - it was neither Holy, Roman or an Empire) the family became von Staffenberg.
In WWII time Deutschland, Valkyrie was code for the Nazi party to maintain control of the Reich in the event of a catastrophic disaster that killed or incapacitated the leadership.
By summertime 1944, 3rd Reich was facing the horrible modern era manifestation of von Gneisenau and von Scharnhorst's ultimate nightmare - the multi front war.
Allies had captured Rome and were grinding their way up the bloody Eyetye boot of Italy, Allies were fixing to bust out of the Normandy bocage and unleash Great Satan's panzer General Patton. And the largest defeat in modern history - the destruction of Armee Gruppe Centre saw the annihilation of 20 irreplacable German divisions in a massive Soviet blitz that drove Germany out of Russia and vaulted the Red Army right outside Warsaw.
Despite Allied claims that only unconditional surrender would satiate the Allied and Russian thirst for righteous payback, a clique of Wehrmacht officers plotted a coup d'tat' against 3rd Reich in an effort to spare Germany ultimate defeat and dismemberment using the contingency plan of 'Valkyrie'.
Germany's armed forces had to swear a 'holy oath' - not to the state or nation or a constitution - but to der fuhrer personally. In order for the plot to work - der fuhrer had to be killed. Valkyrie also planned trying the wartime leaders of 3rd Reich for war and humanitarian crimes, working out reparations with the allies and bringing Germany back into the family of nations.
Claus Schenk von Stauffenberg was a panzer officer that had fought in Poland, France, Russia and with the famous 'Afrika Korps'.
Suffering debilitating wounds from combat - losing an eye, a hand and three fingers, Claus and his co conspirators - facing the truth of the regime they so valiantly served - tried in their own way to rectify their sins - singular and collective.
Valkyrie energized the evil leaders of 3rd Reich, anyone connected with the cats of the coup were ruthlessly hunted down, tormented and slain. The ground ran red with German blood. The regime was determined to fight to the last and like Wagner's "Ride of the Valkyries" heralded the final lo down ho down like Wagner's viking final, apocalyptic battle - "Gotterdammerung"
In the next 9 months Deutsche military fought until there was literally no country left to defend. The Third Reich - she died kicking and screaming, finally crashing down in an orgy of pulverized, burning cities and a river of blood — civilian and military, German and non-German. Military history knows no year quite like 1944 -45 and if lucky, will never see another.
Pic - "2 field marshals, 19 generals, 26 colonels, two ambassadors, seven diplomats, one minister, three secretaries of state, as well as the head of the Reich Police - all perished in the failed Coup d"etat of 20 July 1944".