1.9 - The Combat Update, Minecraft Wiki

1.9 (also referred to as The Combat Update) was an update for Minecraft, released on February 29, 2016. New "tipped" arrows, which apply potion or status effects. New "spectral" arrows that create a glowing outline around the target, making them visible to the attacker through any blocks. (JE only) Axes do more damage, but swings slower. (JE only.) Weapon damage is now dependent on an attack strength bar that is depleted when a player swings, and regenerates over time. The more the bar is filled

Minecraft Combat Update 1.9 - Colaboratory

Java Edition 1.19.1 – Minecraft Wiki

Better Together Update – Minecraft Wiki

Java Edition version history – Minecraft Wiki

Java Edition 1.9.1 – Minecraft Wiki

Minecraft Combat Update 1.9 - Colaboratory

Damage – Minecraft Wiki

Discovery Update – Minecraft Wiki

Ender Dragon – Minecraft Wiki

Java Edition 1.9.4 – Minecraft Wiki

Java Edition 1.19.4 Release Candidate 3 – Minecraft Wiki