The Communists eventually suppressed all non-Communist parties, but they failed to secure a peace deal with France. In the final days of 1946, after a year of diplomatic failure and many concessions in agreements, such as the Dalat and Fontainebleau conferences, the Democratic Republic of Vietnam government found that war was inevitable. The bombardment of Haiphong by French forces at Hanoi only strengthened the belief that France had no intention of allowing an autonomous, independent state in Vietnam. The bombardment of Haiphong reportedly killed more than 6000 Vietnamese civilians. French forces marched into Hanoi, now the capital city of the Socialist Republic of Vietnam. On 19 December 1946, after the Haiphong incident, Ho Chi Minh declared war against the French Union, marking the beginning of the Indochina War. The Vietnam National Army, mostly armed with machetes and muskets immediately attacked. They assaulted the French positions, smoking them out with straw bundled with chili pepper, destroying armored vehicles with "lunge mines" (a hollow-charge warhead on the end of a pole, detonated by thrusting the charge against the side of a tank; typically a suicide weapon) and Molotov cocktails, holding off attackers by using roadblocks, landmines and gravel. After two months of fighting, the exhausted Việt Minh forces withdrew after systematically destroying any valuable infrastructure. Ho was reported to be captured by a group of French soldiers led by Jean Étienne Valluy at Việt Bắc in Operation Léa. The person in question turned out to be a Việt Minh advisor who was killed trying to escape.