Germany (or rather the two Germanies then) has already rearmed ten years after the Second World War, in 1955. And the first time Germany sent troops abroad was in the second half of the Yugoslav wars in the 1990s and have assisted the US and the UK during the Afghanistan war. Bush and his government even tried to convince Germany without any success to take part in the Iraq War, too. Also, the German military has declined due to cuts since 1990 (and dissolved the East German army instead of joining two armies together), because it was the end of the Cold war and also Germany was one of the many NATO countries which spent less than the agreed 2% of the national budget...as ratified. This is why Trump has complained about Germany (and other NATO countries, too) that the US needs to do everything. And even Biden and other NATO countries want Germany to rearm (including Poland and the Baltic states) in order to protect the Eastern flank of NATO, even though sections of the German population do not want to. And another thing I want to mention: Germany voluntarily rejected the idea of producing and owning nuclear bombs.