Historical clue formulations

• Grp. with a phonetic alphabet — 2026-09-15
• Allied grp. — 2026-08-27
• Grp. of peacekeepers — 2026-07-09
• Intl. group formed in 1949 — 2026-05-17
• Defense grp. since 1949 — 2026-04-14
• Grp. joined by Finland in 2023 and Sweden in 2024 — 2026-04-06
• Western defense grp. — 2026-03-09
• Grp. that Sweden joined in 2024 — 2026-01-18
• Iceland is its only member that doesn't have a standing army — 2026-01-10
• Its alphabet starts with Alfa and ends with Zulu — 2025-11-19
• Sweden joined it in 2024 — 2025-06-01
• Defense org. since 1949 — 2025-03-31
• Alliance of 32 nations — 2025-02-20
• Grp. whose alphabet is used eight times in this puzzle — 2025-01-09
• The U.S. is its southernmost member — 2024-06-12
• International grp. with many European members — 2024-04-08
• Alliance that Ukraine seeks to join, in brief — 2024-03-19
• Finland joined it in 2023 — 2023-11-28
• North Macedonia joined it in 2020 — 2023-07-15
• Group in which Iceland is the only member without an army — 2023-01-19
• Grp. known as OTAN in France — 2022-12-28
• Peacekeeping grp. since 1949 — 2022-10-17
• Peacekeeping grp. since 1949 — 2022-10-10
• Its alphabet includes delta — 2022-07-10
• Grp. with peacekeeping operations — 2021-08-31
• ___ alphabet — 2021-08-04
• Post-W.W. II alliance — 2021-07-26
• Kind of alphabet — 2021-03-30
• Alliance formed in April 1949 — 2020-12-01
• Alliance HQ'd in Brussels — 2020-09-21
• Grp. founded to resist Communism — 2020-07-07
• Defense alliance since 1949 — 2020-04-07
• Post-W.W. II alliance — 2020-01-06
• Kind of alphabet — 2020-01-03
• Grp. whose alphabet starts Alfa, Bravo, Charlie ... — 2019-12-04
• Grp. that Ronald Reagan once supported — 2019-06-22
• With 115-Across, communication system that's a hint to the answer to each starred clue — 2019-03-24
• It. is in it — 2019-01-05
• Grp. founded by 12 countries — 2018-11-11
• Montenegro joined it in 2017 — 2018-11-08
• ___ alphabet — 2018-08-28
• Its alphabet goes from Alfa to Zulu — 2018-06-27
• Western defense grp. — 2018-06-05
• Turkey club? — 2018-03-31
• Kind of alphabet — 2017-12-31
• Brussels-based defense grp. — 2017-12-18
• Post-W.W. II alliance — 2017-11-14
• Transoceanic alliance since 1949 — 2017-11-06
• Alliance that keeps a wary eye on Russia — 2017-04-10
• Defense alliance since 1949, for short — 2017-02-20