Deep in the heart of the Leaside neighbourhood in Toronto lies The Leaside Business Park, a vibrant centre for business and manufacturing.  The area also has an almost forgotten military past.

During World War I, Canada Wire and Cable opened a munitions production factory, creating the subsidiary company, Leaside Munitions Company, to oversee shell production.  In May 1917, the Federal Government constructed an airstrip, named Leaside Aerodrome, on about 220 acres of land between Wicksteed Avenue and Eglinton Avenue.  The Royal Flying Corps Canada established a training school, one of three in the Toronto area, for training of pilots, mechanics and maintenance crews, as well as the School of Artillery Cooperation.  The aerodrome featured nine hangars, instructional and repair buildings, a mess hall and a hospital building. Student pilots received instruction on the basics of flight, aerial reconnaissance and aerial combat.

The Leaside Aerodrome was also the destination point of the first "Air-mail" delivery in 1918, having originated in Montreal.  George Lighthall and Edmund Greenwood of the Aerial League of the British Empire, arranged for the airmail delivery.  A plaque commemorating this event sits at the corner of Broadway and Brentcliffe, what was once the north-west end of the airfield.  

After the World War I, the airfield was taken over by the Toronto Flying Club, making it the first flying club in Canada to have their own aerodrome.  
 
The aerodrome closed in 1931 and the Toronto Flying Club moved to a new flying field at Dufferin Street and Wilson Avenue.
 
During World War II, the property was used by the Royal Canadian Air Force as No. 1 Radio Direction Finding School from June 1942 - March 1944, and the station was briefly known as RCAF Station Leaside.

Over the years the area was redeveloped with new manufacturing, retail and residential homes taking over the land.  The last remaining aircraft hangar was demolished in 1971 and today, not the slightest trace remains of the Leaside Aerodrome.  As a nod to the area's aviation past, one of the streets in the area is named Aerodrome Crescent.

It would emerge years later that first "Air-mail" delivery flight in 1918 also has the dubious distinction of being the first time liquor was smuggled aboard an aircraft in Ontario.  In reality, the true purpose of the flight was a scheme by pilot Brian Peck to get a free round-trip flight from Toronto to Montreal to visit his family.  He managed to organize an aerial demonstration at an airshow in Montreal using his Curtis JN-4 (Jenny) aeroplane by convincing the managers of the Leaside Aerodrome that it could be a valuable publicity flight for the recruitment of pilots into the Royal Flying Corps Canada.

It was on the return flight, officially carrying a bag of mail, that the aeroplane was crammed with so many cases of Old Mill scotch, that Peck was only able to keep it about 40 feet in the air.  Peck's mechanic, Corporal C.W. Mathers, was forced to sit atop some of the cases, intended to be used in a wedding celebration for a certain stores lieutenant at the Leaside Aerodrome.  Adding to the weight issues Peck faced, a strong wind caused the aeroplane to burn more fuel than usual and he had to make an unscheduled stop to refuel (first in Kingston, then Deseronto as Kingston had the wrong kind of fuel).  The "history-making" flight was so hastily arranged that even Toronto Postmaster Willliam Lemon, was not made aware of the flight until the plane had landed at Leaside.    area's aviation past, one of the streets in the area is named Aerodrome Crescent.