340

Centuries: 3rd century - 4th century - 5th century

Decades: 290s 300s 310s 320s 330s - 340s - 350s 360s 370s 380s 390s

Years: 335 336 337 338 339 - 340 - 341 342 343 344 345

• Constantine II attacks his brother Constans near Aquileia, aiming for sole control of the western half of the Roman Empire.

• Ambrose, church father (approximate date)
• Jerome, Bible translator (approximate date)

• Constantine II, joint emperor of the Roman Empire (killed in battle)