The ruling says the armed forces can be deployed only if Germany faces an assault of “catastrophic proportions”, but not to control demonstrations.
The decision to deploy forces must be approved by the federal government.
Severe restrictions on military deployments were set down in the German constitution after Nazi-era abuses.
The court says the military still cannot shoot down a hijacked passenger plane – fighter jets would have to intercept the plane and fire warning shots to force it to land.
After World War II the new constitution ruled that soldiers could not be deployed with guns at the ready on German soil.
The court has now changed that, saying troops could be used to tackle an assault that threatens scores of casualties.
The judges had in mind a terrorist incident involving armed attackers in public places.
German troops have been deployed abroad since the war, but it has been a gradual process.
German warplanes have been used in the Balkans and troops are on the ground in Afghanistan, protecting construction workers, but able to return fire if attacked.
The US House Ethics Committee has voted to release its report on former Republican Representative…
ABC News has agreed to pay $15 million to President-elect Donald Trump to settle a…
South Korea’s parliament has voted to impeach President Yoon Suk Yeol over his failed attempt…
Israeli war planes have carried out more than 100 air strikes in Syria on December…
President-elect Donald Trump has threatened to impose 100% tariffs on the BRICS countries if they…
Syrian troops have withdrawn from the city of Aleppo following an offensive by rebels opposed…