Boehmer, Hasso von, born 09-08-1904, in Groß Lichterfelde, 
German Empire, started his military career as an officer cadet in the 9th Potsdam Infantry Regiment.
Infantry Regiment 9 of Potsdam (I.R. 9) was an infantry regiment in Weimar Republic’s Reichswehr and Nazi Germany’s Wehrmacht, descended from famed 1st Prussian Regiment of Foot Guards in the German Empire’s Deutsches Reichsheer. Garrisoned at the cradle of Prussian army and rich with tradition, it was nicknamed ‘Count Nine’ (Graf Neun) or ‘I.R. von 9’ by its detractors because of high percentage of Prussian aristocrats and purported arrogance in its ranks.
Hasso suffered multiple woundings in Poland and France after 1939. A Oberstleutnant in the General Staff, he was married to Käthe Torhorst, with whom he had a daughter and two sons. His friend Henning von Tresckow Hermann Karl Robert “Henning” 
recruited him for the aims of the resistance groups formed around Ludwig August Theodor Beck
and one of the leaders of the conservative widerstand movement in Nazi Germany Carl Friedrich Goerdeler. 
Hasso volunteered for the planned coup as a liaison officer in military district XX (Danzig). On the day of the attempt, however, Hasso von Boehmer was away from Danzig on official business and did not return until the evening. His superior, the commander of military district XX headquarters General Bodewin Claus Eduard Keite
l,
a brother of Field Marshal Wilhelm Bodewin August Gustav Keitel, 
was also away on the same day. Having heard of the failed assassination attempt on the radio, Bodewin Keitel immediately returned to Danzig.
Hasso von Boehmer was won over to the plotters’ cause by Tresckow, and he placed himself at their disposal as a liaison officer in the Wehrkreis (“Defence District”) XX (Danzig – Gdańsk, Poland). On the day of the attempt on Hitler’s life at the Wolf’s Lair in East Prussia,
Hitler’s tattered trousers
Hasso von Boehmer was accepting all the plotters’ teleprinter messages which were reaching him from Berlin. After the news spread that Hitler had survived the attempt,
Death and burial ground of Boehmer, Hasso von.
Hasso von Boehmer was arrested the very same day and taken to the prison on Lehrter Straße in Berlin.
Owing to an illness, he ended up in the clinic in the Sachsenhausen concentration camp.
Execution order: 
On 05-03-1945, the German “People’s Court” (Volksgerichtshof) under jurist Roland Freisler
sentenced him to death by hanging for his part in the 20 July Plot. He was executed the same day 05-03-1945, aged 40, execution by hanging in Plötzensee Prison. Hasso’s ashes got a place on the Plötzensee cemetery, in an anonymous grave, like all Plötzensee victims.
The July 20, 1944 plot was an attempt to stage a coup and assassinate Adolf Hitler. 
The plan was put into effect on July 20, 1944 by officers of the Wehrmacht and other organizations. The actual leader of the plot was Henning von Tresckow, but he could not take an active part in the uprising. From then on the leadership was in the hands of Colonel Graf Claus von Stauffenberg.
Stauffenberg (left) on the Wolfsschanze (July 15, 1944)
The coup plotters gave the attack the code name ‘Operation Walküre’.Graf von Stauffenberg himself would carry out the attack on Hitler during a military staff meeting in the Wolfsschanze headquarters near Rastenburg in East Prussia, a huge and well-secured bunker complex. Stauffenberg placed the single primed bomb inside his briefcase and with the unwitting assistance of Major Ernst John von Freyend
, the Staff officer in the OKW and adjutant to Generalfeldmarschall Wilhelm Keitel entered the conference room containing Hitler and 20 officers, positioning the briefcase under the table near Hitler. After a few minutes, Stauffenberg received a planned telephone call and left the room. It is presumed that Oberst Heinz Brandt,
who was standing next to Hitler, used his foot to move the briefcase aside by pushing it behind the leg of the conference table, thus unwittingly deflecting the blast from Hitler but causing the loss of one of his legs and his own demise when the bomb detonated. The attack failed and coup prompted the Gestapo to arrest more than 7,000 people, 4,980 of whom were executed.
Ernst John von Freyend himself was slightly injured, survived the war and died, age 70 on 24-03-1980 and Heinz Brandt was wounded when the bomb exploded, it blew one of Brandt’s legs off.and Heinz died 21-07-1944 (aged 37), a day after the assassination attempt on Hitler in the Wolf’s Lair hospital Carlshof and was posthumously promoted to Generalmajor by Hitler.
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