The homestead act allowed people to claim and settle land in the great plains so long as they

Signed into law in May 1862, the Homestead Act opened up settlement in the western United States, allowing any American, including freed slaves, to put in a claim for up to 160 free acres of federal land. By the end of the Civil War, 15,000 homestead claims had been established, and more followed in the postwar years. Eventually, 1.6 million individual claims would be approved; nearly ten percent of all government held property for a total of 420,000 square miles of territory.

The Homestead Act (May 20, 1862) set in motion a program of public land grants to small farmers. Before the Civil War, the southern states had regularly voted against homestead legislation because they correctly foresaw that the law would hasten the settlement of western territory, ultimately adding to the number and political influence of the free states. This opposition to the homestead bill, as well as to other internal improvements that could hasten western settlement, exacerbated sectional conflicts. Indeed, the vision of independent yeomen establishing homesteads on the prairies was offered in the political rhetoric of the 1850s as a vivid contrast to the degradation of slave labor on southern plantations. A homestead bill passed the House in 1858 but was defeated by one vote in the Senate; the next year, a similar bill passed both houses but was vetoed by President James Buchanan. In 1860, the Republican platform included a plank advocating homestead legislation.

most people were factory or company owners.

the fact that could also be added to column b is that during world war ii, specifically between the years 1941 and 1945, japan expanded its territory towards the indonesian territory in what was known later as part of the "pacific war". in that time, japan could conquer the philipines, singapore,   borneo, central java, malang, cebu, sumatra and various other islands of the area, therefore expanding its territory for a brief period of time.