The first Allied shot of the First World War was fired by the Australian coaster Woniora. By coincidence, the first Allied shot in the Far Eastern theatre of the Second World War was fired at the same ship.
A pretty remarkable state of affairs, I think you’ll agree.
On August 5th 1914, the UK having declared war on Germany only the day before, the Woniora fired on the German steamer Pfalz (not to be confused with the manufacturer of German planes) when it attempted to leave Australian waters. The Pfalz was captured and served out the rest of the war the Australian troopship HMT Boorara.
Then on September 3rd 1939, the Woniora was fired upon by a (n Allied) twin 6-inch gun emplacement at Point Nepean, the entrance to Melbourne’s Port Phillip Bay. The ship’s commander, Captain F. N. Smale, had ignored orders to heave-to for inspection.
If you’re interested, the first shot of the Second World War in Europe was fired at 4:47am on the morning of September 1st 1939 (thats 20 years, 9 months, 19 days and 18 hours after the last shot of the First World War) from the 13,000 ton German gunnery training battleship Schleswig Holstein. The target was the ‘Westerplatte,’ an area of Danzig, now Gdansk, containing Polish troop barracks, munitions storage and workshops.