Linked from
The 28 pages that link to Invasion of Poland, each with the reason it gives.
Władysław SikorskiRelated: The invasion drove Sikorski into exile and created the government he led.
Free City of DanzigRelated: The city’s annexation accompanied Germany’s attack on Poland.
Phoney WarRelated: The invasion triggered Britain and France’s declarations of war on Germany.
Fedor von BockRelated: Bock commanded Army Group North during the invasion.