Original sentence: Along with fellow Colonel Georgios Papadopoulos and Brigadier Stylianos Pattakos, he led the group of mid-ranking officers that overthrew the government of Panagiotis Kanellopoulos in a coup d'état on 21 April 21 1967 and established a military regime—the "Junta of the Colonels"—that lasted for seven years
Edited sentence: Along with fellow Colonel Georgios Papadopoulos and Brigadier Stylianos Pattakos, he led the group of mid-ranking officers that overthrew the government of Panagiotis Kanellopoulos in a coup d'état on 21 April 1967 and established a military regime—the "Junta of the Colonels"—that lasted for seven years