Temporary trenches were also built. When a major attack was planned, assembly trenches would be dug near the front trench. These were used to provide a sheltered place for the waves of attacking troops who would follow the first waves leaving from the front trench. "Saps" were temporary, unmanned, often dead-end utility trenches dug out into no-man's land. They fulfilled a variety of purposes, such as connecting the front trench to a listening post close to the enemy wire or providing an advance "jumping-off" line for a surprise attack. When one side's front line bulged towards the opposition, a salient was formed. The concave trench line facing the salient was called a "re-entrant." Large salients were perilous for their occupants because they could be assailed from three sides.
Democratic backsliding and authoritarian drift remain sources of instability. The Ugandan parliament’s December decision to remove the presidential age limit will allow President Yoweri Museveni to run for a sixth term in 2021; longstanding and seemingly mounting grievances against his continued rule are feeding popular discontent . One-person or one-party rule and the closure of political space in Chad and Ethiopia risks stoking similar problems. All three governments enjoy significant Western support, related to the role their security forces play in Western-backed military operations across the continent. But if these governments are perceived as reliable security partners abroad, they increasingly deepen problems at home and behave in ways that foment rebellion.
The German troops however, were quickly tiring from the prolonged effort, as well as giving in to periods of looting. The economic blockade of Germany had cut off many vital supplies and back home, many people were literally starving. Many German troops were chronically undernourished, and whenever they encountered Allied food stocks, much time was lost as these desperately famished troops gorged themselves. So the last German offensive, an attempted pincer operation around Rheims ( marked 4 ), was finally stopped with concentrated artillery and aircraft attacks. By late June, German strength on the Western Front fell below that of the Allies, and the final Allied assault was not long in coming.