Salzburg beginning on 29 April. Believing cavalry was of little use in the mountains, Jellacic sent Provenchères toward Vienna on 1 May with the O'Reilly Chevauxlegers # 3. Hiller fought the Battle of Ebersberg on 3 May, then crossed to the north bank of the Danube on 11 May. On 4 and 5 May, Jellacic fought a successful rearguard action at Lueg Pass, 40 km south of Salzburg. In the clash, a few hundred Hungarian regulars and Grenz infantry repulsed a brigade of pursuing Bavarians under the overall command of Marshal François Joseph Lefebvre. In Italy, General of Cavalry Archduke John defeated Viceroy Eugène at the Battle of Sacile on 16 April. Eugène fell back to Verona where he gathered reinforcements until he was superior in numbers to his Austrian opponent. After hearing news that Archduke Charles was in retreat, John withdrew from his Adige River defenses on 1 May. On 8 May, Eugène and John fought the Battle of Piave River and the Austrian retreat continued. John split his army, sending Feldmarschall-Leutnant Ignaz Gyulai along a southerly route to Ljubljana (Laybach), while taking his attenuated main body northeast to Villach. Sending General of Division Jacques MacDonald and 20,000 soldiers after Gyulai, Eugène followed John with 25,000 troops. As John's columns slipped away toward Klagenfurt and Graz, Eugene entered Villach on 20 May. On 15 May, Jellacic held Salzburg with 10,200 troops and 16 artillery pieces of the Northern Division. His force included 2,880 poorly trained Landwehr and only 60 cavalrymen. After receiving orders from Archduke John to join him at Graz, Jellacic evacuated Salzburg on 19 May. By this time his isolation had become dangerous. Eugène at Villach was only 130 km from Graz, while Jellacic at Salzburg was 200 km distant from Graz. Battle French order of battle Corps: General of Division Paul Grenier Artillery: One 6-pdr foot battery, one 4-pound horse battery. This source shows Durutte's division had a 6-pdr foot battery at Piave. In Eugene's army all horse batteries had 4-pound guns. Division: General of Division Pierre François Joseph Durutte Brigade: General of Brigade François Valentin 22nd Light Infantry Regiment (two battalions), 23rd Light Infantry Regiment (four battalions) Brigade: General of Brigade Joseph Marie, Count Dessaix 62nd Line Infantry Regiment (four battalions), 102nd Line Infantry Regiment (three battalions) Attached: 6th Chasseurs à cheval Regiment (four squadrons) Division: General of Division Jean Mathieu Seras Brigade: General of