Dispatched troops on January 7, 1979 the Vietnam army of Kampuchea razzias gilt-edged, drive Boerbute nonofficeholding. This distance Vietnam dispatchs troops around has half month time only, why can Vietnam army beat civilian card quickly so do 20 groovy division take next Phnom Penh easily? Should have the following sides only most. The first, civilian card interior begins to break up, if assistance is jumped over army the martial important official of the division commander level that the person such as Han Sanglin is civilian card. The 2nd, the difference of force of bilateral military affairs, vietnam dispatchs troops Kampuchea is army of a Vietnam be consideringed as the military affairs of top scale acts, surmounted historic liberation on the west tribute battle (also make introduced from the northern and western nationalities or from abroad 1975 keep in mind bright battle) . Hu Zhiming battle is jumped over army have 265 tank, 127 panzer and 241 artillery and artillery piece of 400 much upper air. And during card jumps over a war, more army started 3 army group and 3 military region in all nearly 200 thousand military strength. Card jumps over a war army heavy-duty weapon exceeded Hu Zhiming battle, jump over especially army used 600 tank and panzer, many 400 large artillery, 139 planes, 10, 000 cars and numerous ship vessel. Card jumps over a war is empty three armed services of Vietnam land sea is coordinated first fight. Came on December 22, 1978 on January 17, 1979, vietnam air force dispatchs 54 times, had a fight 99 times in all, add up to 627 sortie, atttack a war 352 times directly among them. Vietnam air force controlled Kampuchea territorial air completely during whole war. And civilian card respect has 23 division only, it is 20 infantry division respectively, 2 seas counsellor and an empty counsellor. Although division of civilian card infantry also deploys heavy weapons, but only a few cannon and tank and panzer. And the sea air force of civilian card basically did not have effect. The 3rd reason is civilian card waiver has a street battle in the city, and turn to fight for enemy's rear area, jump over army relaxed and occupational Kampuchea city. Civilian card faces fully armed Vietnam army at that time, zhu Ben uses guerrilla tactics to answer more army, avoid direct confrontation. Summary of civilian card strategy is " the enemy (more army) mobile, we come back. The enemy stops, our agitate. Enemy exhaustion, we fight. Enemy backtrack, we are tracked " , it is bushfighting actually classical 12 words " enemy retreat into me, enemy be stationed in my faze, enemy exhausted I am hit, enemy retreat me to chase after " . The last reason is Boerbute is underestimated to Vietnam, he thinks Vietnam is not powerful, dare not attack Kampuchea in the round, so civilian card does not have the preparation that meets head-on in the round at all. Civilian card beforehand appraise is jumped over army it can assault Mekong only east bank, with border is jumped over to build a buffer in card, liberate alignment for Kampuchea nation (Han Sanglin) build a base. Dan Lingmin card of unexpected is to jump over army attune to jump over army picked it is to hope with one action destroyed civilian card, give aid to card civilian solution enters Phnom Penh. The graph had a lot of other big cities of Kampuchea capital Phnom Penh and Kampuchea to passed army of Vietnam of half month time on January 7, 1979, begin to differentiate the border of Vietnam Kampuchea.