from Paris. Desperately trying to wrest the initiative back from the archduke, Napoleon consolidated his forces and ordered Marshal André Masséna's IV Corps and General of Division Nicolas Oudinot's II Corps on the right flank to march on Landshut to cut the Austrian line of communications. He planned for Marshal François Joseph Lefebvre's Bavarian VII Corps to hold in the center at Abensberg while Davout's left flank III Corps withdrew west to escape being trapped between Charles' main body and the Danube. On 19 April, Charles realized he had an opportunity to destroy Davout. He launched 65,000 troops in three powerful columns northwest as Davout attempted a flank march across his front. Luckily for the French, General of Cavalry Johann I Joseph, Prince of Liechtenstein's 20,000 troops found no opposition on the Austrian right. In the center, General of Division Louis-Pierre Montbrun's 3,800 cavalry and infantry skilfully held off Feldmarschall-Leutnant Prince Franz Seraph of Rosenberg-Orsini's much stronger IV Armeekorps for most of the day. On the left flank, Feldmarschall-Leutnant Prince Friedrich Franz Xaver of Hohenzollern-Hechingen's III Armeekorps crashed into General of Division Louis Vincent Le Blond de Saint-Hilaire's division and a terrific fight blazed up. Both sides fed in reinforcements as the infantry battled over a pair of parallel ridges in the Battle of Teugen-Hausen. Ultimately, Davout brought superior forces to bear in the late afternoon and pushed back the Austrians a short ways. That night, Charles ordered Hohenzollern to withdraw a little to the east, closer to his main body. On the morning of 19 April, Archduke Charles requested that Hohenzollern provide a link between the III and V Armeekorps. Accordingly, the III Armeekorps commander detached General-Major Ludwig Thierry's 6,000-man infantry brigade to his left. As an additional link between Thierry and III Armeekorps, Hohenzollern detached General-Major Joseph Freiherr von Pfanzelter with a Grenz infantry battalion and two squadrons of hussars, about 1,000 men. While the Battle of Teugen-Hausen raged, Thierry clashed with Bavarian troops near Arnhofen and fell back to Offenstetten. Austrian deployment On 20 April, Archduke Charles' main body consisted of the III, IV, and I Reserve Armeekorps. These were arrayed near Dünzling and Eckmühl. Feldzeugmeister Johann Kollowrat's II Armeekorps spent 19 April attacking Regensburg from north of the Danube. While successfully defending the city, Colonel Louis Coutard's 2,000-man 65th Line Infantry Regiment ran dangerously low on small-arms ammunition. General of Cavalry Count Heinrich von Bellegarde's I