Answer based on context:

60 Razvedupr officers were dispatched to Tallinn in the spring of 1924 to organise an uprising. The plan for was hatched by Jaan Anvelt and Karl Rimm. The latter was a veteran of the Russian Civil War. The plan envisaged the main attack aimed at Tallinn, with subsequent coups in Tartu, Narva, Pärnu, Viljandi, Rakvere, Kunda, and Kohila. The revolt was supposed to start at 5:15 a.m. The 279 communists, mostly infiltrated from the Soviet Union, were armed with 5 Thompson light machine guns, 55 rifles, 65 hand grenades, 8 explosive devices and 150 pistols. It was mistakenly expected that the workers and soldiers would join the insurgency and would seize power in the capital together. The plan called for the establishment of an Estonian Soviet Socialist Republic and of a "working people's government". Most of the schemes were spoiled by the Trial of the 149 in November 1924, which eliminated many potential communist organisers. The gunmen's first priority was to take over the Estonian National Defence College based in the Tondi suburb south of the city centre, the main narrow gauge railway station in Tallinn-Väike, and a battalion of engineering troops in Nõmme.

What happened second, 60 Razvedupr officers getting dispatched to Tallinn or Trial of the 49?
Trial of the 149