- "The expedition was manned with veteran soldiers, wise and powerful mages, and some of the strongest, fiercest orcs and goblins. Abundantly supplied, intensely trained and led expertly, it was a force to be reckoned with.The general, the centurions and the rank and file all did their duty... Yet it took merely seven days. It was only seven days since the opening of the Gate. Counting from the day when the enemy begun a serious counterattack, it took them only two days to devastate the imperial army" — The disastrous outcome of both the Battle of Ginza and the First Battle of Alnus Hill, in which the Empire lost more than half of their power in such short time, depicted in volume 1 prologue of the light novel.
The First Battle of Alnus Hill is the first battle and offensive made by the JSDF after the Battle of Ginza in the Special Region. The battle of also serves as first expedition of the JSDF into the world beyond the Gate.
In order to determine the enemy position and number as well as terrains, the JSDF sent UGV to scout the area first. When the UGV drone came beyond the Gate in Alnus Hill, they were able to scout the area and the numbers of Imperial Troops around Alnus Hill that including retreating troops from Ginza and reinforcement from the capital.
During the scouting, most Imperial Soldiers or Auxillary troops hesitated to attack the drone since they were clueless about what it was due to the massive gap in technology between the Empire and Japan.
After the scouting was completed, the JSDF sent a battalion of tank and armored vehicles to assault Imperial's position in Alnus Hill. The reinforcement Imperial's army and the retreating army from Ginza commanded by Senator and Mage Godasen at the time were completely overwhelmed and helpless against the superior firepower of machine guns and tanks of the JSDF and their primitive weapon like arrows, ballistic or catapult were completely useless against the modern steel plates of tank and armored vehicle of the JSDF.
''In order to regain control over the Gate, cavalry was sent to on a massed charge. However, that ended with the foot of the hill littered with thousands of stinking corpses of men and horses.''
The utter massacre of the Imperial cavalry when they charged to their doom toward JSDF tanks, artillery and machine guns, depicted in Light novel Volume 1, prologueGodasen tried to repel the JSDF by initiating mass cavalry charge at the hill, only to see the entire cavalry regime under his command perished at the foot of the hill. As the result, the whole Imperial military camps and army were being decimated after a whole day of futile fighting. Only Godasen and few troops made back Sedera alive with massive injuries.
After cleaning up the corpse of Imperial troops, the JSDF began to set up permanent base in Alnus Hill. While setting up defense to fight the Allied army in the Second Battle of Alnus Hill.