"...few marriages of convenience worked out better for both parties than that of Maximilian and the new Inspector General of the Mexican Imperial Army, Ludwig von Benedek, who arrived in time for Christmas Mass in 1868. Ostracized publicly in native Austria for his poor performance in the Second Unification War, von Benedek elected to follow the Emperor's younger brother west to the New World, as did many Europeans to a Mexico that promised them immediate citizenship upon arrival. It was von Benedek who advised Maximilian that the Mexican Army needed considerable reforms to bring it merely to European standards. Maximilian, still resentful of the 10,000 French Legionnaires who stayed at their fortress at Veracruz and behaved as if they owned the city, was eager to rebuild the military, especially after some Republican stragglers in the north staged raids in November that embarrassed the government.
Benedek was perhaps the most valuable immigrant under what would today be considered an "open door" policy - indeed, the Hungarian was proclaimed Duke of Tampico, one of many honorary titles Maximilian became fond of giving out over his long reign, and died in 1881 a profoundly respected figure [1] - but the stream of Europeans to Mexico brought with it money, and investors, and practices of business often foreign to the previously unstable Mexico. Coal and silver mining by 1870 was mined in the same efficient manner as was common in Europe, filling the Mexican treasury's coffers (helpfully allowing it to settle many of its foreign debts over the next many years) and giving a boost to nascent industry in Mexico City, Guadalajara and Queretaro. The Bank of Mexico and South America, having shed the "London" from its name in 1868, emerged as one of Latin America's largest financial institutions and normalized banking separate from merchant guilds and loans from the clergy. Its board of directors was a mix of Mexicans - almost all peninsulares - and Englishmen, and a new headquarters for the bank, lavish in design and featuring Aztec-inspired frescoes in its grand hall - was opened on the Paseo de Emperatriz that same year. 1869 would be the first of many high points of Maximilian's reign - the Paris-inspired Paseo de Emperatriz [2] cutting through the city from the Zocalo, lined with trees and new neighborhoods for the city's growing urban elite, was finally completed. It was the year that construction on the Tehuantepec Railway was finally begun. And late that year, Carlota would give birth to the second of the couple's sons, José Francisco Carlos Maria. And, perhaps most importantly, it was the last year that Maximilian continued to view France and the Confederacy as his most important allies [3]..."
- Maximilian of Mexico
[1] Sometimes the butterflies give the destitute a happier ending
[2] Essentially a Mexican Champs d'Elysees
[3] Sorry Nappy! This was pretty much inevitable considering all the Germans/Austrians coming to live in Mexico, the fact that it's British and American financiers funding his railway projects, and the fact that a more humbled Napoleon III doesn't really scare anyone post-Treaty of Brussels. 10k troops in Veracruz isn't really enough to project power in a vast Latin American empire, and I haven't found much to suggest what Napoleon's post-Mexico designs were, anyways