Germany's invasion of Poland.
There was a war that began in Iraq in 1980, but the war began with an invasion of Iran, not Iraq. That war is the Iran-Iraq War and lasted from 1980-1988.
Poland.
THE PERSIAN GULF WAR OF 1990-1991 began after Saddam Hussein led an Iraqi invasion of Kuwait.
Poland
The invasion of Poland which began in September 1939
launched an invasion of Kuwait
Invasion of Poland, September 1, 1939.
Germany's invasion of Poland started it on the 1st of September 1939.
Poland on September 1st, 1939.
France and the UK, who declared war on Germany after the Invasion of Poland began.
The war in Europe began in 1939 with Germany's invasion of Poland. The war in the Pacific began several years earlier when Japan invaded China.