Why did Poland declare war on Japan in World War 2?

Why did Poland declare war on Japan in World War 2? With all of the political discord and military conflict, there were some details of the war that managed to become overshadowed and almost forgotten today. One of these such details is the declaration of war by Poland’s contemporary government-in-exile, on their good friend, Japan. ♦Consider supporting the Channel of Patreon : https://www.patreon.com/Knowledgia ♦Please consider to SUBSCRIBE: https://goo.gl/YJNqek ♦Music Used : Kevin MacLeod - Decisions Kevin MacLeod - FaceOff Music: Miguel Johnson - No Turning Back Link: https://youtu.be/NW5DqE_02sQ​​ Music provided by MFY - No Copyright ♦Script & Research : Skylar Gordon ♦Sources : https://www.tandfonline.com/doi/abs/10.1080/09555809508721545?journalCode=rjfo20 https://www.mofa.go.jp/region/europe/poland/data.html #History #Documentary