The fictional date of Branded.
If Smoke Signal (1955) happens in the same fictional universe as the television series Branded (1965-1966), the Bitter Creek Massacre in Smoke Signal (1955) and the Battle of Bitter Creek in Branded (1965-1966) are likely to have been the same event, happening before Smoke Signal and the episodes of Branded.
According to the thread:
https://moviechat.org/tt0048634/Smoke-Signal/5cbd4aea0e45e31e6aea7d4f/The-Fictional-Date-of-Smoke-Signal
The fictional date of Smoke Signal (195) should be either sometime between April 24, 1868 and the end of 1877, or else sometime between April 16, 1869 and April 15, 1870.
John Pickard played General Phil Sheridan in three episodes of Branded, "Call to Glory", Parts 1, 2, & 3, 27 February, 6 and 13 March, 1966. If Sheridan has two stars on each shoulder strap those episodes would happen before March 4, 1869, and if he has three stars on each shoulder strap they would happen after March 4, 1869 - if they happened in real life. John Pickard was born June 25, 1913, and was 52 years, 8 months, and 2 days old when "Call to Glory Part 1" aired. Phil Sheridan, born March 6, 1831, would have been that age on November 8, 1883.
William Bryant (January 31, 1924-June 26, 20011) played President U.S. Grant in eight episodes of Branded between "The Mission" Part 1 on March 14, 1965 and "The Assassins" Part 2 on April 3, 1966. Bryant was between 41 years, 1 month, and 14 days and 42 years, 2 months, and 3 days old when those episodes were broadcast, which would put them in 1863 to 1864 if Grant, born on April 27, 1822, was as old as Bryant. Grant was president from March 4, 1869 to March 4, 1877.
Robert Lansing, born June 5, 1928, played George Armstrong Custer in "Call to Glory", and was 37 years, 9 months, and 22 days old when "Call to Gory Part 1" aired on February 27 1966. George Armstrong Custer, born on December 5, 1839, would have been that age on August 27, 1876. But George Armstrong Custer actually died on June 25, 1876, so "Call to Glory" must happen before then.
And no doubt there are other details in various episodes of Branded that would help to date them.