Unified field theory classical field theory and, two years later, that of Theodor Kaluza, who extended General Relativity to five dimensions. Continuing in this latter direction, Oscar Klein proposed in 1926 that the fourth spatial dimension be curled up into a small, unobserved circle. In Kaluza–Klein theory, the gravitational curvature of the extra spatial direction behaves as an additional force similar to electromagnetism. These and other models of electromagnetism and gravity were pursued by Albert Einstein in his attempts at a classical unified field theory. By 1930 Einstein had already considered the Einstein–Maxwell–Dirac System [Dongen]. This system is (heuristically) the super-classical [Varadarajan] limit
Unified Command of the area east of the canal (Egypt) first changed the force structure of the army by creating a "unified command" to oversee counterterrorism operations east of the Suez Canal. The second promoted Osama Askar, commander of the Third Field Army, both in rank and in title: he is now a lieutenant general—one of a handful in the armed forces—and in charge of the "unified command." He will also retain his seat on the SCAF. Askar’s former deputy, Muhammad Abdullah, has been appointed commander, and Tarek Anwar Helal the chief of staff, of the Third Field Army. Nasr 13 was the first manoeuvre of its type since the