What happened May 1935 AD

From Zunyi, Mao led his troops to Loushan Pass, where they faced armed opposition but successfully crossed the river. Chiang flew into the area to lead his armies against Mao, but the Communists outmanoeuvred him and crossed the Jinsha River. Faced with the more difficult task of crossing the Tatu River, they managed it by fighting a battle over the Luding Bridge in May, taking Luding.

The Soviet Union drafted a treaty of mutual assistance with France. Before taking effect, though, the Franco-Soviet pact was required to go through the bureaucracy of the League of Nations, which rendered it essentially toothless. The Franco-Soviet Treaty of Mutual Assistance was a bilateral treaty between France and the Soviet Union with the aim of enveloping Nazi Germany in 1935 in order to reduce the threat from central Europe. The pact was concluded in Paris on May 2, 1935 and ratified by the French government in February 1936.

The 1935 Quetta earthquake occurred on 31 May between 2:33 am and 3:40 am at Quetta, Balochistan, British India (now part of Pakistan). The earthquake had a magnitude of 7.7 Mw  and anywhere between 30,000 and 60,000 people died from the impact.