"extended back to" is a grammatically correct phrase that can be used in written English.
It is typically used to indicate that something or someone reached or stretched to a previous point or time. This phrase can be used in a variety of contexts, such as historical events, physical objects, and relationships. Example: The timeline of the conflict extended back to the early 1900s, when tensions first began to rise.
His distinguished career extended back to the early 1940s in the FDR administration, when he contributed significantly to the Department of the Interior "Portal-to-Portal" case, which improved working conditions for coal miners.
The phrase "these new people" generally signified people who had moved to California after the Second World War but was tacitly extended back to include the migration from the Dust Bowl during the nineteen-thirties, and often further.
We extend our heartfelt sympathies to Ann, Roy S. and Jimmy with the passing of their beloved father Roy R. The friendship of our respective fathers extended back to 1910, a century ago.
Mr. Turner's career extended back to the 1950s, when he played with pioneering Mississippi Delta bluesmen and helped shape early rock 'n' roll as well as soul and rhythm-and-blues.
Mr. Gelb's familiarity with Mr. Glass's work extended back to the historic 1976 presentation of "Einstein on the Beach" at the Metropolitan Opera House, when Mr. Gelb was a publicist for events staged there by outside producers.
Furthermore, it was not narrowly nationalistic; it extended back to the beginnings of the human race and showed how Yahweh, the Lord of the whole earth, was working out his divine plan for humanity through his promise to the chosen people.
He plays live alongside an extended back-to-back set from reliable pan-genre Numbers stars Jackmaster and Spencer.
Interest in volcanic phenomena extends back to ancient times.
But the chapel evokes a strain of architecture that extends back to the Mayans.
Its reservoir extends back to include Lake Baikal, designated a UNESCO World Heritage site in 1996.
The cities of Samarkand, Bukhara, and Tashkent have histories that extend back to ancient times.
