Merge pull request #7409 from yanesca/lts-lifetime-clarification-2.28
[Backport 2.28] Clarify LTS lifetime
diff --git a/BRANCHES.md b/BRANCHES.md
index 680c0ca..6d2e5c0 100644
--- a/BRANCHES.md
+++ b/BRANCHES.md
@@ -16,6 +16,11 @@
also maintain ABI compatibility within LTS branches; see the next section for
details.
+Every major version will become an LTS branch when the next major version is
+released. We may occasionally create LTS branches from other releases at our
+discretion.
+When a new LTS branch is created, it usually remains supported for three years.
+
## Backwards Compatibility for application code
We maintain API compatibility in released versions of Mbed TLS. If you have