Question: When did the US and Britain invade the country that seized Libya from the main subject of the Ottoman era in the history of the country in which Lom is located in 1911?

<P0-S0> the gilded age in united states history is the late 19th century, from the 1870s to about 1900. the term for this period came into use in the 1920s and 1930s and was derived from writer mark twain's 1873 novel the gilded age: a tale of today, which satirized an era of serious social problems masked by a thin gold gilding. <P0-S1> the early half of the gilded age roughly coincided with the middle portion of the victorian era in britain and the belle époque in france. <P0-S2> its beginning in the years after the american civil war overlaps the reconstruction era (which ended in 1877),. <P0-S3> it was followed in the 1890s by the progressive era. <SEP> <P1-S0> As a result of the Russo-Turkish War (1877–1878), the Principality of Bulgaria, a self-governing Ottoman vassal state that was functionally independent, was created. <P1-S1> The history of Ottoman Bulgaria spans nearly 500 years, from the conquest by the Ottoman Empire of the smaller kingdoms emerging from the disintegrating Second Bulgarian Empire in the late 14th century, to the Liberation of Bulgaria in 1878. <P1-S2> In 1885 the autonomous province of Eastern Rumelia came under the control of the Bulgarian Tsar. <P1-S3> Bulgaria declared independence in 1908. <SEP> <P2-S0> The Lom (, ) is a river in northwestern Bulgaria, a right tributary of the Danube flowing into it 1 km east of the town of Lom. <SEP> <P3-S0> The operation was undertaken by General Sir Harold Alexander's 15th Army Group (comprising General Mark W. Clark's Fifth Army and General Bernard Montgomery's British Eighth Army) and followed the successful invasion of Sicily. <P3-S1> The main invasion force landed around Salerno on 9 September on the western coast in Operation Avalanche, while two supporting operations took place in Calabria (Operation Baytown) and Taranto (Operation Slapstick). <P3-S2> The Allied invasion of Italy was the Allied amphibious landing on mainland Italy that took place on 3 September 1943 during the early stages of the Italian Campaign of World War II. <SEP> <P4-S0> These provinces together formed what became known as Libya. <P4-S1> As a result of this conflict, the Ottoman Turks ceded the provinces of Tripolitania, Fezzan, and Cyrenaica to Italy. <SEP> <P5-S0> libya (; ; ), officially the state of libya, is a country in the maghreb region in north africa, bordered by the mediterranean sea to the north, egypt to the east, sudan to the southeast, chad to the south, niger to the southwest, algeria to the west, and tunisia to the northwest. <P5-S1> the sovereign state is made of three historical regions: tripolitania, fezzan and cyrenaica. <P5-S2> with an area of almost , libya is the fourth largest country in africa, and is the 16th largest country in the world. <P5-S3> libya has the 10th-largest proven oil reserves of any country in the world. <P5-S4> the largest city and capital, tripoli, is located in western libya and contains over one million of libya's six million people. <P5-S5> the second-largest city is benghazi, which is located in eastern libya.