Born in Canfranc, Aragon, and the son of the town's miller, Ezquerra was a Falangist and enthusiastically signed up for military service on the Nationalist side after the military coup of 18 July 1936. He fought on the fronts of Aragon, Madrid, Extremadura and Teruel, in the 7th "Bandera de Castilla" and in the 6th Granada Infantry Regiment. He was wounded in fighting around Huesca, commissioned as a "provisional second lieutenant" and ended the war as a provisional first lieutenant. He received several medals for valor. After the end of the war he was demobilised, and worked as a provincial chief of the "Obra Sindical de Artesania" union. He married Consuelo Reinoso and they had two daughters. On hearing the news of the outbreak of the Second World War, he immediately visited the German embassy in Madrid, offering to enlist on the German side. His enthusiastic offer was noted, but tactfully declined. Later when Spain decided to send volunteers to assist German efforts on the Eastern front, he enrolled in the Blue Division. The Blue Division was ordered to the siege of Leningrad where it would eventually participate in the Battle of Krasny Bor. Later, after the Blue Division had been repatriated to Spain on April 2, 1944, he was determined to continue to fight. He secretly crossed the French border in April 1944 to enlist in the Wehrmacht, and he was eventually transferred into the Waffen-SS.
As part of the 11th SS Panzergrenadier Division "Nordland", and with the rank of Hauptsturmführer, Miguel Ezquerra fought to defend the town of Stettin on the Oder River and then helped defend Berlin against Soviet troops, commanding a unit formed by Spanish Fascists, who were among the last defenders of the bunker of Adolf Hitler. The so-called "Ezquerra Unit" was tiny, made up of 37 Spaniards. He was briefly captured by Soviet troops but was released and after various misadventures across Western Europe, where he passed himself off as an Argentine citizen, Ezquerra returned to Spain. Miguel Ezquerra was author of the book Berlín, a vida o muerte. Little is known about his later life. It is generally agreed that he was one of the most notable Spanish combatants in the Second World War. It has been alleged that he received several decorations and awards, including the Knight's Cross of the Iron Cross and had German nationality granted to him personally by Hitler but there is no hard evidence to those claims.. Some historians, such as Kenneth W. Estes, question the assertions made by Ezquerra himself, as no evidence has ever been found to corroborate his claims about the role he played. While no one denies he was present in Germany and that there was a unit of some sort bearing his name, his real rank and participation in some events can be questioned.
Ezquerra, for example, claims to have been promoted from Lieutenant to Lieutenant-Colonel, orally, between his 1944 arrival in Stablack and final combat in Berlin. During this time, he allegedly served in the Army's special operations unit, the "Brandenburgers," first fighting Maquis in and out of Paris, and then with his Spanish commando unit, fighting behind the American lines in the Battle of the Bulge. He claimed to have had personal contact with Hitler, who orally awarded him the Knight's Cross; Himmler, Goebbels, and Berger; and to have seen Martin Bormann and Axmann. In the last days of the war, his "Ezquerra Unit" — now absorbed into the Waffen-SS, consisted of three companies of Spaniards, some "Doriot Milice" and more Spaniards from the Walloon Division.
Since 1995, the remains of Ezquerra have rested next to those of his comrades in the Vault of the Blue Division, in cemetery of the Almudena at Madrid.
