War Summary at a Glance From Capitals of World By Associated Press Paris French announce defeat of German air fleet in two major air battles; French big guns reported pounding main forts of Siegfried line along entire western front. Basel Swiss dispatches say French resumed drive against Siegfried line from Saar basin to Vosges mountains in heaviest western front action to date. Rom anshorn, Switzerland German airplane motor plant in former Zeppelin works at Friedrichshafen reported disabled by allied air raid. Berlin Germans say massing of troops along Netherlands and Belgian frontiers is precaution against French and British plans; announce British destroyer sunk by submarine. Copenhagen Day long cannonading indicates naval battle may be under way off Norwegian cost. (Report of battle is denied by Birtish.) Moscow Estonian foreign minister leaves Moscow suddenly; diplomats discuss possibility Russia might be making demands on small neighbor. Turkish foreign minister arrives. Panama United States delegation calls on American republics to resist all aggression, offers United States economic aid in war emergency. Washington President Roosevelts effort to repeal arms embargo gains strength in senate as administration forces propose substitute described as strict cash and carry system. London Britain studies problems of munitions and supply. Shanghai Ten thousand Japanese soldiers and equal number of Chinese reported killed in Japanese drive on Changsha.