It is the year 1700. The Serbian military emerged from its trial by fire under Czarina Bojana and the wars against the Roman-Nord alliance a modern juggernaut with total supremacy over its lands and immediate frontiers. Twice in the 17th century the Serbian Empire fought the Roman and Scandinavian alliance; the first time it destroyed the Roman fleets and waited for 45,000 Romans to descend upon Aleppo before hundreds of thousands of Serbians ambushed them, killing them to the man. And whilst this went on the 160,000 soldiers in the east assaulted the Roman fortifications. It validated Bojana's reforms, where once 6,000 men could be tasked with overseeing a province and 12,000 men an entire region or frontier, now hundreds of thousands were recruited or Territorial Armies reformed into whole Regiments.
The second war against the Roman and Nordic Empire was even more devastating. The Serbian army made no move to attack, keeping its newly organized and modern regiments safe behind the frontline Fortresses in Egypt. The Roman Navy fought the Serbian Navy whilst the Roman Legions and Nordic Legions fought the Holy Roman Empire forces. It would culminate in a horrendous battle where 180,000 Germans would fight 180,000 Romans, 177,000 French would invade the Roman Empire and 35,000 Serbians took Constantinople whilst the Serbian fleet blockaded the entirety of the Roman Empire and prevented the Roman Legions from returning through the Bosphorous to save the Empire falling to the 400,000 Serbian soldiers annihilating the Roman siege lines. The Serbians forced the Romans to concede defeat whilst they continued fighting the Holy Roman Empire, Ilkhanate, French Empire, Spanish Empire and British Empire. After some reforms under Czarina Thorborg the Serbian Empire went from having a large army with ok commanders to having the greatest commanders to have ever lived - the likes of Kasjan Stephan that would never be seen again, leading some of the most disciplined and high-morale soldiers with some of the best equipment, elite Gusar cavalry and advanced artillery without equal. Even the Navy was updated to extreme lengths, with Czarina Thorborg placing the largest order of ship construction in Serbian history, ordering the construction of 900 state of the art Frigates, Heavy Warships and transports to rival the British Royal Navy and Roman Navy. This sprung a new age of conquering and warfare, and most importantly challenged British dominance of the Ivory Coast and Roman rivalry in Alexandria and Aleppo. The Serbian coffers had shrunk to 30,000 gold, the lowest it had ever been since the first Serbian King installed the Miroslav Papacies. This violently reversed this trend, bringing the Serbian Empire to 300,000 brilliant pure gold Vuks! The Serbian Empire was once more in the position it was - it could subsidize the entire Miroslav family.
In the West, the Americas - the Spanish made history by defeating the Native American coalitions of Cherokee, Miami, Pawnee, Fox and Najavo, with British help and Serbian subsidies playing a significant role. The North American Serbian colonies - Slavland, New Serbia, Xokej and Serbian Louisiana secured their future lebensraum against the superior colonizers of the Spanish, British, Incan and Aztec Empires. In South America the most significant developments were that the Serbian colonies emerged as the prime colonial powers, the nations to dominate South America.
In the beginning the Serbian outposts were tiny things, with the advantage of being the first Miroslav outposts. The colonies conquered and built downwards until they came into contact with the Incan Empire, where the struggle between the Macabre and the Miroslav began. The Incan Empire enjoyed technological superiority for the first wars in the 1500s, but by the 1600s the Miroslavs were using Roman guns and cannons - and the Serbian soldiers were of another make entirely. In the 1620s the Serbian colonies armies and the British armies were defeated by the Incans on land whilst the British fleets won at sea; even the 35,000 Serbian soldiers initially sent were defeated by the 60,000 Incans who were fighting the British, Serbian and Serbian Colonial armies all at once. The Incans only lost because the Serbians brought in another 30,000 from the South African garrison. Eventually victorious, the Serbian forces ripped out a great big chunk of Incan colonies and territories which ended the Incan hopes of turning South America into an unstoppable Incan Fortress. This chunk of land was split between Dragutrin (Serbian Brazil), Serbian La Plata (Serbian Argentina+Chile) and Peru (Serbian Peru), and was supposed to be the stepping stone to taking over the Incan Empire. In the interim of warfare Serbian and Catalan La Plata fought fiercely over dominance of La Plata, twice Catalan La Plata invaded Serbian La Plata and twice it lost. The third war was an invasion by Serbian La Plata, and this war was decisively won - uniting all of La Plata under the Serbian Colony.
Chronologically, after this happened the Serbian Army became preoccupied with its war with the Romans, the war at sea and the war across Persia and Anatolia. This fact was lost on the Incans, who a world away had become preoccupied with regaining their Imperial Pride. After their southern lands were lost to the Serbians they were invaded by their even older enemy, the Aztecs, though it is unsure how this war ended it seems to have ended with Aztec Colombia growing safer... And larger. Their hopes were not all lost however, as massive rebellions from Peru to La Plata resulted in 150 years of South American expansion being undone as vast swathes of the Serbian colonies defected back to the Incan Empire and their Quechen kin. Ethnic-Serbian territories within Peru, La Plata and Dragutrin still remained, a thin Serbian line halting this rebellion from turning into a rout and Incan domination of the South American continent.
The Czarina of the Serbian Empire was in quite the panic, as the Czarina before her had disbanded the American regiments to fund for the new Indian, Jerusalem and Egyptian regiments (as there were just over 120,000 in America, very expensive at the time). She ordered a new transport fleet to be constructed, and to prepare for a great war, right after the Serbian Empire just finished bloodying its hands in the Roman War.
With everyone in Europe at war, every Great Power from the Ming to Incans in some coalition, alliance, bloc or war - it was inevitable that something wrong was bound to happen. The Czarina was going to allow the Incans to regain their strength, not out of desire - but out of necessity, as the Ming, Romans and Nords were beginning to exert pressure on the borders whilst the British and Incans themselves were beginning to compete with the Serbians in Oceania with colonists, not soldiers. The Serbian Empire was unparalleled in land, but a naval invasion was always a sketchy affair. A little more time was needed...
Before the war against the Romans was ended on the Serbian side (no concessions, just a declaration of defeat), the Serbians declared war on the tiny remnants of the Pasai Sultanate in Indonesia. What the Czarina Miroslav did not notice however, was that the Sultanate of Pasai was in a coalition with the distant Incan Empire on the other side of the Planet.
All the while 40,000 Serbian soldiers conquered the Pasai in the East and withdrew from the Rome front in the West, the Incans spilled across the Serbian colonies occupying everything except the Falklands, some southern Fortresses and the east Brazilian coastal territories. If this were a movie, this would be the moment the scrappy underdog overthrew the sprawling Imperial Dominus for freedom and liberty. Unfortunately for the Incans, the Aztec Colombian governor would attack a small British colony in the Caribbean. This would bring the British Empire, Newfoundland, the Thirteen Colonies, the British West Indies, Serbian Louisiana, Slavland, New Serbia, Xokej, Vukodacia, Dragutrin, Peru, La Plata, the Serbian Empire and later the Spanish Empire and Catalonian Colombia bearing down on the Empire of the Sun. The Alexandrian Guard, 35,000 strong would kill the small Aztec siege force, before noticing the Incans to the south. The Serbian fleet would withdraw from the Aztec front south.
The Incans met the southern Serbian colonies head on and wiped the floor with them, they were led by their Emperor and had state of the art firearms and cannons. They had popular support, and rebels and freedom fighters were rising up against the Serbian foe everywhere. The Alexandrian Guard first secured the southern La Plata territories, moving north whilst another regiment formed from the Antioch and Al-Gharbia Territorial arrived. Once both regiments arrived they both marched north, executing every rebel along the way. They marched north with popular support - fraticelli Quechens joining and fighting for the Serbian Empire with extreme vigour against their Incan cousins. The Incans seemed to realize that the Serbian Regiments were different from the ones they fought before, as they tried to withdraw. They fled the march of the Antioch Regiment, only to be ambushed by the Alexandrian Guard. The Serbian Army that fought the Incans was not the one they remembered. Before their superior firepower and their elite soldiers could tear through the Serbian Army, their cannons bearing down on the Serbian mortars with ease. Their only cause for worry was the elite Gusar.
Here the elite Gusar was no less dangerous, only even moreso. What had changed was that the Serbian cannons were now superior, their firearms superior and their soldiers superior. They were disciplined, naturally and instinctively moving cannon and lines of infantry rapidly through the South American mountains, jungles and fields - mowing down swathes of Incan riflemen, breaking their ranks for the devastating Gusar charge. The Serbian Armies were highly mobile, intercepting all Incan armies, pursuing them to the ends of their earths. To make matters worse, the Serbians had brought their best generals - one conquistador having traveled all the way from the Japanese campaign just to lead the Serbian army in pursuing the Incan army to destruction. It got so bad that all that remained of the Incan army was 7,000 men trapped in a northern valley, with hostile Aztecs to the North and 30,000 Serbians to the south. By the turn of the 1700s their situation had not improved, and in all likelihood the Incan Empire is likely going to suffer a death blow from which there is no recovery. Nonetheless, the Aztecs have managed to expand into Siberia and Oceania, and may survive in some overseas legacy.
The Aztec Empire was not safe either; the north Serbian colonies and the British Empire and her colonies were occupying great tracts of lands in the north and Central America. In many cases the Aztec Empire was incapable of retaking these lands, because to transport troops by sea was to face destruction by the British Royal Navy or Serbian Colonial Navies, and to travel by land would require going to war with the Spanish Empire. This choice was taken from them when the Spanish Empire smelled weakness and decided now was the time to strike, bringing her armies and fleets to bear on the Aztec Empire. By the turn of the 1700s the Aztecs had taken some Serbian, Spanish and British colonies in the Colombian and Caribbean region and their Armies are still intact, not having fought any major battles with Miroslav armies. The coin is still in the air on the Aztecs.
In the East the Ming Empire of the Miroslavs finally destroyed all of the hordes and took over their lands, with the exception of the Manchu who are now their vassal state. The Scandinavian Empire, Ming Empire and Serbian Empire have all been vying with each other over East Asia; it has never spilt into outright warfare as no one seems to want war - these three Empires are the ones whose tactics consist of throwing the most men and firepower at the enemy; it would not be a pretty sight. Nevertheless the Serbian border with Ming has continued to be fortified and 150,000 men recruited to stand on the Mingroslav border, just in case.