 Complete the following phrase:  On 11 November 1805, the Austrians fought a successful rear guard action at Valvasone on the Tagliamento River in which the 23rd and 30th Dragoons were present. Lacour led four regiments of dragoons in action at Flitscher-Klause Bovec on 19 November. General-major Heinrich Bersina von Siegenthal commanded two artillery pieces and 1,200 Austrians in the De Ligne Infantry Regiment Nr. 30. Because the action was fought in a mountain pass, the Austrians were able to hold off Lacours column. Since no French officers became casualties, losses were probably light. The 23rd, 24th, 29th, and 30th Dragoon Regiments were the only units of that type with Massénas army. Lacours independent force eventually linked up with Michel Neys VI Corps at Villach. Lacour participated in the 