Who is the famous person that said shall return?

The famous person who said "I shall return" is General Douglas MacArthur, the American general who commanded Allied forces in the Pacific during World War II.

He said it in a radio broadcast on March 17, 1942, after being forced to leave the Philippines in the face of the Japanese advance. The phrase became a rallying cry for the Allied forces and a symbol of MacArthur's determination to liberate the Philippines.