Final answer:
President Nixon released the transcripts of the White House tapes on August 5, 1974, which played a pivotal role in his eventual resignation on August 8, 1974, due to the Watergate scandal.
Step-by-step explanation:
On August 5, 1974, President Nixon complied with the subpoena and made the transcripts of the tapes available to the public. This event occurred shortly before Nixon resigned from the presidency on August 8, 1974, following the Watergate scandal.
After the U.S. Supreme Court case United States v. Richard M. Nixon, Nixon was ordered to release the White House tapes that indicated his involvement in a cover-up of the Watergate break-in. The released tapes severely undermined Nixon's public image and contributed to his decision to resign.