The Battle of Lioma (30–31 August 1918) was fought between the German Empire and British Empire during the East African Campaign of World War I. Having successfully evaded the Allies since late 1917, the German Schutztruppe under Paul von Lettow-Vorbeck waged a guerilla campaign in Portuguese East Africa, attacking and raiding settlements as well as forts in the search of supplies while inflicting as much damage as possible on the Allies. All the while, the Schutztruppe was chased by the British King's African Rifles, which finally cornered the Germans at the village of Lioma on 30–31 August 1918. Led by George Giffard, the British forces almost managed to encircle and destroy the Schutztruppe, but in the end the Germans broke out and successfully retreated. Although greatly weakened by the fighting at Lioma, the Schutztruppe was thus able to remain active until the end of the war.
Background
After suffering heavy casualties throughout 1917 and being unable to hold territory in German East Africa any longer, Lettow-Vorbeck decided to invade Portuguese East Africa in hopes of acquiring sufficient supplies to continue the war. In this he was successful: While the German troops were able to forage food by plundering the countryside, the Schutztruppe defeated the Portuguese colonial and metropolitan forces several times, most notably during the Battle of Ngomano, thereby capturing large quantities of weapons, ammunition and medical supplies from the enemy. Historian Gregg Adams even comments that the Portuguese became "the unwilling quartermasters for the Schutztruppe". With the Portuguese proving unable to defeat the German forces, the British had to bear the brunt of the fighting in Mozambique, and thus began to aggressively pursue Lettow-Vorbeck's small army.
By August 1918, the Schutztruppe was heading north to return to German East Africa, while the British under Jacob van Deventer had begun to concentrate their forces in the area of Regone and Lioma in an attempt to encircle their enemy. Though Lettow-Vorbeck had received intel about the British plans, his forces were once again in dire need of supplies and Regone harbored a large supply depot. As result, the German commander planned a quick assault against the vulnerable village in order to capture as many supplies as possible: Speed was crucial for this plan, as Lettow-Vorbeck would have to outrace the British before they could reinforce Regone or catch up with him. Rough terrain, rain and fog hindered and delayed the Schutztruppe, however, so that when it reached Regone on 26 August, the British had already fortified and reinforced it. At this point, the Germans could only have taken Regone by a prolonged siege for which they had no time, so that Lettow-Vorbeck chose to call off the attack. His forces bypassed Regone and instead began to march to Lioma, another supply depot. Unknown to the Germans, a British battalion (1/1st KAR) already managed to reinforce the village on 28 August, while two other battalions also force-marched toward Lioma. Between the British forces at Regone and the units that gathered at Lioma the Schutztruppe would be trapped, and if everything went according to van Deventer's plans, destroyed.
While British skirmishers harassed the approaching German forces, the 1/1st KAR under Maj Alexander Charles Masters dug in at Lioma: They formed a square defensive perimeter south of the village, and three small platoon outposts were also set up west, east and south of the British positions. Thus prepared, the Lioma garrison waited for the Schutztruppe, which would arrive in the area on 30 August.
Opposing forces
Germans
By 1918, the once strong Schutztruppe, which had successfully resisted the allies for four years, was much depleted and exhausted. Of its peak strength of around 15,000 soldiers in 1916 just about 1,600 were left. Many African as well as European soldiers had deserted or surrendered as the allies overran their home areas in German East Africa, wages were no longer paid, and life in the army became harder and more brutal. Many of the soldiers also became unfit for combat due to the extreme food shortages and disease under which the Schutztruppe suffered. Driven from their territory and unable to regularly recruit or train new soldiers, manpower shortages among the common soldiers were severe, while officers and NCOs became irreplaceable. This was particularly problematic because the Schutztruppe's ability to continue to function as coherent, effective fighting force largely rested upon its experienced and capable leadership.
Nevertheless, most of the black soldiers who had already served since before the war were still staunchly loyal to Lettow-Vorbeck by 1918, with their fighting spirit and morale remaining largely unshaken. Even though they suffered from exhaustion, poor supplies, hunger, excessive heat or cold, and an increasingly experienced and stubborn opponent in form of the King's African Rifles during the fighting in Portuguese East Africa, these core cadres refused to give up – be it out of loyalty to their comrades, economic self-interest, desire for revenge, or sheer will to survive. Battle-hardened, experienced in mobile bush-warfare, and possessed by a strong esprit de corps after years of warfare, they still constituted a force to be reckoned with. Lettow-Vorbeck himself would judge after the Battle of Lioma that his men had fought "brilliantly" in face of the odds. Willpower alone could not substitute for adequate supplies and reinforcements, however, so that the Schutztruppe's effective combat power had still much declined by 1918, and the Germans could no longer meet strong enemy formations head-on without risking their own destruction.
British
The British soldiers that faced the Schutztruppe at Lioma were part of the King's African Rifles (KAR), a long neglected branch of the British colonial forces. Having proven themselves to be among the most effective opponents of the Schutztruppe, the KAR were drastically expanded, strengthened and reorganized after 1915. Their tactics and strategies were adapted to the mobile German bush warfare, and better equipment and weaponry was given to the British askaris. Unlike the Germans, whose supply and recruitment prospects deteriorated as the war went on, the KAR could replenish its ranks. The massive expansion of the KAR meant, however, that most of its troops were fresh recruits and thus inferior in experience to the hardened Schutztruppe. At Lioma, for example, the 1/1st KAR mostly consisted of recent recruits from Nyasaland (modern-day Malawi) formed around a cadre of veterans. Furthermore, the extremely poor quality or non-existence of roads in Mozambique greatly hindered the supply of the large numbers of KAR soldiers who chased the small Schutztruppe. As result, both British white officers as well as askaris had to live off the land and often were, just like their German counterparts, near starvation. In one case, when "the officers and men [of one unit] were inspected at the end of their stint in the field they were described as resembling the victims of famine. Their experience of the hardships of war in East Africa was typical, not exceptional."
"Colonel Gifford [sic.] himself, an efficient and tireless soldier, expected his officers and men to be the same. Cool and collected in any engagement, he was, as I have said, with his column, our one redeeming feature in this 1918 campaign in P.E.A. (...) without Colonel Gifford [sic.] and the K.A.R. 2nd Col. it might easily have been almost disastrous."
Despite these adverse conditions, the British native soldiers generally proved themselves to be tenacious and very capable fighters, motivated by a variety of reasons, most of them rooted in traditional African concepts of loyalty and their comparably high wages. The white and black officers and NCOs of the King's African Rifles also led by example and like their Schutztruppe counterparts suffered heavy losses, though unlike the Germans the British could relatively quickly replace them. New British white officers often could not speak Swahili (the regional lingua franca), however, hindering communications with their men.
One of the most important British commanders during the operations in Mozambique was Lt-Col George Giffard; leading a brigade (K.A.R. 2nd Col. or "KARTUCOL") specifically to find and destroy Lettow-Vorbeck's remaining troops, he was highly regarded by both his own forces and respected by the Germans. His troops would relieve the Lioma garrison on the battle's second day.
Battle
Engagement at Lioma (30 August)
The Schutztruppe arrived at area surrounding Lioma on 30 August. The British forces at Lioma had noticed the German approach hours before the latter's arrival, and thus could strengthen their defenses accordingly. Indeed, as the German columns (Abteilungen, short: Abt) advanced on the village, one of the relief units, namely 3/2nd KAR under Lt-Col Charles George Phillips, arrived around 12:00 and deployed north-east of 1/1st main position at Lioma.
While the newly arrived battalion was deploying, the Schutztruppe's vanguard, formed by Abt Müller, encountered a detached platoon of 1/1 KAR east of Lioma, resulting in a first skirmish, whereupon the leading soldiers of Abt Müller retreated southwards. When Lettow-Vorbeck learned of this firefight, he incorrectly assessed that the British had not yet fortified their positions due to the minimal defenses of the encountered forward outpost. Believing that the enemy positions were still vulnerable, he consequently ordered Abt Göring and Abt Müller to flank 1/1st KAR's main position, while Abt Poppe was sent against and overran the British outpost around 14:30. An attempt by the British to relieve the detached platoon failed, though Hptm. Poppe was seriously wounded during the British counter-attack. As result of the German encirclement movement, communication between 1/1st and 3/2nd KAR was severed.
Around 16:30, the Germans launched their determined attack on 1/1st KAR's main position with around 1,000 men and 30 machine guns. The assault began with Abt Müller attacking from the east and north, followed by Abt Poppe from the south. At the same time, 3/2nd KAR launched a number of counter-attacks against the Germans, capturing Abt Müller's baggage and reserve ammunition, and blocking Abt Göring's attempt to also flank 1/1st KAR. Unable to advance further, Hptm. Karl Göring consequently ordered part of his force to oppose 3/2nd KAR, while the rest charged 1/1 KAR's western perimeter. The vigorous, unnerving German attacks scattered 1/1 KAR's carriers and caused many casualties, among them several senior officers of the battalion killed or wounded, including Major Masters, who had to be replaced by Captain Stanley Conway John as commanding officer of 1/1 KAR. Nevertheless, the 1/1st KAR's askari held firm and reportedly displayed "excellent" shooting. One small German group actually succeeded in breaking into the northwestern corner of the British defensive square, but they were quickly killed. The Schutztruppe continued its attacks until 22:30, when the mounting casualties among his troops led Göring to the conclusion that a continued engagement was futile, whereupon he ordered a withdrawal. The German units subsequently retreated south to rejoin the rest of their forces.
Escape of the Schutztruppe (31 August)
In course of the following night, Lettow-Vorbeck came to the conclusion that his forces had to escape Lioma toward the east; he knew that the Schutztruppe needed a respite and that more enemy units were converging on his position. On the other side, 2/2nd KAR had reached Lioma, while 1/2nd KAR was closing in on the Nalume River crossing to the village's east; thus, by early 31 August, three British battalions were in the vicinity of Lioma, with a fourth marching to blockade the most important eastern escape route. Lt-Col Giffard, who had arrived with 2/2nd KAR and now took command over all present British forces, consequently saw a good opportunity to finally encircle and crush the Schutztruppe.