Tales of Suspense #39 (Lieber/Ditko/Colan/Heck) - March 1963

The first appearance of Tony Stark and Iron Man. Cover art by Jack Kirby who designed the first costume:

Lovely boots...

Stark is injured in Vietnam and captured by the Vietcong who want him to build a powerful weapon.

Tony begs to differ and builds the Iron Man armor to save his life. His first steps after donning the suit are clumsy to say the least:

Writers have updated the time and circumstances in which Tony Stark was injured. In the 1990s, it was during the Gulf War and later again the war in Afghanistan.

The Invincible Iron Man Vol. 4, #5 (Ellis/Granov) - 2005

"Eat this..."