From Dreams of a Great Small Nation: The Mutinous Army that Threatened a Revolution, Destroyed an Empire, Founded a Republic, and Remade the Map of Europe, by Kevin J. McNamara (PublicAffairs, 2016), Kindle Loc. 1184-1207:
Almost 900,000 emigrants arrived in Russia from Austria-Hungary between 1828 and 1915, among them tens of thousands of Czechs and Slovaks. The largest number resided in the vicinity of Kiev (Ukraine), where there was a Czech High School, a Prague Hotel, and, by 1910, a weekly Czech-language newspaper, the Čechoslovan. In most combat nations, “enemy aliens” were subject to internment, deportation, and expropriation of their property. Unlike in most countries, however, where enemy aliens often lived on the margins of society, in Russia the Czechs and Slovaks were business owners, managers, landowners, professionals, engineers, foremen, and skilled workers. Yet, at the outbreak of the war, the Russian public began targeting any person whose ethnicity, religion, or former citizenship might link that person to Austria-Hungary or other enemy nations. By 1914 there were about 600,000 “enemy aliens” and 100,000 visitors from enemy nations in Russia. Of these, about 200,000 were Czech and 600 were Slovak, with 70,000 of them in farming communities in Ukraine. More than half had arrived in Russia since 1885 and many had never become naturalized Russian citizens.
During the first week of hostilities, the Russian army sealed the borders to immigrants who might think of escaping the country. As early as July 25, 1914 (OS), the army ordered the deportation from areas under military rule of all “enemy-subject males of military service age,” specifically, “all German and Austrian males age 18–45 who were deemed physically capable of carrying a weapon.” This order was quickly extended to the entire Russian Empire and included women and children as well. As many as one-half of Russia’s 600,000 “enemy” subjects were sent to camps or designated areas held under police surveillance. As early as September 1914, the government ordered the confiscation of all property belonging to anyone who was even suspected of belonging to a pan-German organization. Given the use of German by many non-German Habsburg subjects and the dearth of information regarding Vienna’s non-German minorities, Czechs and Slovaks were easily targeted. “A sense quickly grew among officials that all enemy-alien property was fair game.” Factories, farms, and stores could be confiscated, often at the behest of disgruntled Russian customers or competitors who turned their business disputes into acts of revenge by denouncing their “enemy alien” owners.
Once it was clear that mere suspicion of enemy support or sympathy could cost an immigrant freedom or property, thousands of aliens applied for exemptions and persons of Slavic ethnicity received most of them. The first exemptions were granted to Czechs. Committees of Czechs and Slovaks sprang up in the major cities to petition the government. Delegations met with the minister of internal affairs, Nikolay A. Maklakov, and the foreign minister, Sergey D. Sazonov, solemnly pledging their allegiance to Russia.