Tennaiite Front
The Tennaiite Front was a theater of conflict bewteen the Inner Sphere and the Common Axis during the Siduri War, pitting the Republic of Syara and Fascist Allamunnika against Tennai, Cacerta, and Ruvelka. The conflict occurred largely within Tennai and along the Tennaiite-Alamunnic border. The theater is known by several names; among Syarans it was simply called the Southern Front, while general historians have preferred the nameSouthern Siduri Theater.
Fighting on the Tennaiite Front began in October 1934 when the Inner Sphere commenced the Invasion of Tennai. Although Tennaiite intelligience had been aware of the buildup, the initial invasion overwhelmed Tennaiite border defenses along the Northern Khastravali Mountains. Tennaiite border outposts along the mountains were quickly overrun, while surviving border guards attempted to carry out a guerillia campaign behind IS lines. Syaran and Allamunnic forces then crossed over the Southern Khastravali Mountains, before descending into the lowlands where they encountered the bulk of the Royal Tennaiite Armed Forces, backed up by fresh Cacertian reinforcements. The fighting entered into a stalemate in by the spring of 1935, broken by a Common Axis counter-offensive during the summer that met with mild gains. A renewed Inner Sphere drive into the heart of Tennai was repusled in the winter, and by spring of 1936 the Common Axis had driven the invaders back into the Khastravali. The Front thereafter settled into a strategic stalemate as both sides struggled to mount large scale offensives amid the rugged terrain. Hundreds of thousands of Ruvelkan troops took part in the campaign due to their familiarity with mountain warfare, and the Royal Tennaiite Air Force distinguished itself through several successful air campaigns against the Inner Sphere. By the spring of 1937 the Inner Sphere had been pushed back near the original border, and the subsequent development of the Quenminese Front resulted in the withdrawal of Allamunnika from the war.
Because it lacked the large scale, wide sweeping offensives of the Quenminese theater, or the mass maneuvers of Mansuriyyah, the ground combat of the Tennaiite Front has often been superceded by the air war that took place in the skies over the frontlines. The rugged terrain meant that the fighting was mostly an affair between mountain infantry and artillery, with limited roles for tanks and other forms of armor.