 The Israeli up-gunned 75 mm M-50 and 105 mm armed M-51 Super Shermans are remarkable examples of how a long obsolete design can be upgraded for front-line use.They saw combat in the 1967 Six-Day War, fighting Soviet World War II-era armor like the T-34/85, and also in the 1973 Yom Kippur War, proving effective even against newer, heavier Soviet tanks like the T-54 and T-55.Paraguay retired three Shermans from the Regimiento Escolta Presidencial (REP, Presidential Escort Regiment) in 2018, which marked the end of service of the final Sherman tanks in use anywhere in the world.