this depends on what you mean by "aircraft". If you mean any flying thing that is capable of bearing a man, that would date to as early as the 1700s. but if you mean a controlled, powered, flyable thing, December 1903.
Frank Whittle invented the Jet Aircraft.
1903. This was the first successful, powered, piloted flight in history.
The steamboat was invented about a hundred years before the aircraft.
me
I would consider the first military aircraft as the Fokker Eindekker. It was invented in 1914
1996
Wright brothers
me lol
1895 in India.
Radar was invented in 1935 by Scottish physicist Sir Robert Watson-Watt. He developed the first practical radar system for detecting aircraft.
The Wright Brothers
Pratt & Whitney Aircraft