George Wyndham entered the Royal Navy in 1799 as a midshipman in HMS Amelia. In 1802 he transferred to the Army as a cornet in the 5th Dragoon Guards, promoted in 1803 to lieutenant in the 3rd Dragoon Guards.
George Wyndham began his military career in 1799 as a young officer on HMS Amelia. He later transitioned to the Army in 1802, taking on a role as a cavalry officer with the 5th Dragoon Guards and was subsequently promoted to lieutenant in the 3rd Dragoon Guards in 1803.