Instead they were reduced to the slow attrition of a tonnage war. The war in Afghanistan brought with it losses by attrition. Abrasion often presents in conjunction with other dental conditions such as attrition, decay and erosion. Emphasis shifted to naval battles and strategies of attrition such as blockades and sieges. Battles against him often devolve into wars of attrition. The raids disturbed civilians, and continued the war of attrition against Fighter Command. Attrition reserve aircraft numbers are limited due to the small fleet size. Proficiency level seems to play the largest role in the extent of attrition. The Soviet idea of direct warfare was replaced with a Maoist war of attrition strategy. This is intended to sacrifice defense for optimized preemptive strikes and attrition warfare. The American strategy had become the pursuit of a war of attrition. It was however engaged extensively in the following War of Attrition. Company size and industry also play a key role in attrition rate. The combatants resorted to a "strategy of attrition". This war of attrition was divided into three main campaigns.