Conversation so far:
Where was Lew Grade born?
Lew Grade was born in Tokmak, Taurida Governorate, Russian Empire to Isaak and Olga Winogradsky.
What did Lew Grade do in 1958?
In September 1958, the American Independent Television Corporation purchased Television Programs of America (TPA) for $11,350,000. Wrather sold his shares to Lew Grade at the end of the decade.
When did World World War II start?
World War II started in 1939.

Question: When did he get discharged and what was the problem?
Self-contained rewrite: When did Lew Grade get discharged and what was the problem?