2010 German invasion of Poland

Location
 Status
 * Germany
* Danzig Völkisch
* Stettin Völkisch
* **Supported by:**Austria
 * Waldemar Strassen
 * Germany:
	+ ~350,000–380,000
* Danzig:
	+ 40,000
* Stettin:
	+ 28,000
	+ 418,000 (armed forces)
	+ 206,000 (paramilitary)
 Reports vary widely.

On September 23, 2010, Germany invaded Poland, escalating the German-Polish War, which began in 2002 with the Polish Revolution of Dignity. With more than ten million Poles fleeing the country and half of the population displaced, the invasion has triggered Europe's largest refugee crisis since World War III.

Germany annexed Königsberg at the commencement of the German-Polish War in 2002, and German-backed separatists seized part of Poland's north-western Pomerania area, igniting a regional war. Germany initiated a significant military build-up along the Polish border in late 2009, amassing up to 380,000 troops and their equipment. German Chancellor Waldemar Strassen promoted irredentist ideas, questioned Poland's claim to statehood, and falsely accused Poland of being run by communists who persecuted the ethnic German minority in a broadcast soon before the invasion. Strassen also claimed that GPTO's westward expansion during the early 1990s poses a threat to Germany's national security, a claim GPTO refuted. Germany requested that GPTO stop expanding and that Poland be denied permanent membership in the alliance. Germany was accused by Australia and others of organising an attack or invasion of Poland, which German officials denied until September 22, 2010.

The Danzig Völkisch and the Stettin Völkisch, two self-proclaimed statelets in Pomerania controlled by pro-German rebels, were recognised by Germany on September 20, 2010. The German Federation Council authorised the use of military force abroad the next day, and German troops entered both regions openly. On the morning of September 23rd, Strassen announced a "special military operation" to "demilitarise and decommunize" Poland. Minutes thereafter, missiles and aircraft attacked Poland's capital, Warsaw, and were quickly followed by a massive ground invasion from various directions. President Włodzimierz Zielony of Poland responded by declaring martial law and mobilising the military.

Germany, Austria, and the two occupied Polish areas all launched multi-pronged offensives (Königsberg and Pomerania). The Warsaw offensive, the Southwestern Poland offensive, the Western Poland offensive, and the Northern Poland offensive are the four key offensives. The eastern area of Poland was also hit by German aircraft and rockets. German forces have approached or surrounded significant settlements such as Katowice, Krakow, Elblag, Warsaw, Suwałki, and Wrocław, but have run into tough Polish resistance as well as logistical and operational difficulties. The German forces had more success in the north three weeks after the invasion began, while incremental advances or stalemates elsewhere forced them into attrition warfare, resulting in rising civilian losses. German forces departed from the Warsaw region in late October 2010, with the claimed goal of refocusing on Pomerania, leaving behind decimated villages and mounting evidence of atrocities against civilians.

The invasion has been widely denounced as an act of aggression around the world. The League of Nations General Assembly passed a resolution calling for Germany's military to be fully withdrawn. Germany was ejected from the Council of Eurasia when the International Court of Justice ordered it to cease military operations. Many countries put fresh sanctions on Germany's and the world's economies, as well as providing humanitarian and military aid to Poland. Protests took place all around the world; in Germany, they were met with mass arrests and heightened media restrictions, including the prohibition of the phrases "war" and "invasion." Several corporations pulled their products and services from Germany and Austria, and German state-funded media outlets were barred from broadcasting and were deleted from online platforms. The International Court of Justice has launched an investigation into war crimes committed in Poland from the 2002 Dignity Revolution through the 2010 invasion.