|Siege of Bethune, 1710|
Engraving by unknown author
(British Museum, link)
Allied forces under General-Lieutenants Johann Matthias Graf von der Schulenburg (of Saxon service, commanded Imperial troops) & François Nicolas Baron Fagel (of Dutch service, commanded British-Dutch troops) totaled about 30-32,000 men:
Bethune finally capitulated on August 29, 1710 on the terms of the free passage of the garrison to Arras. French lost 435 killed & 800 wounded (according to Puy-Vauban's Relation). Allies lost 854 killed & 2507 wounded.
The detailed account of the siege you may find in J. P. F. Reeve's "The Siege of Bethune 1710: The Journals of Private Deane and General Vauban Compared" (you may reed it on-line at JSTOR: link)