After the Nazi invasion of Czechoslovakia and the creation of the Protectorate, he returned to Duchcov, but was arrested there after a conflict with the Sudeten German Party.

[2] After the outbreak of World War II on September 1, 1939, the Czechoslovak Legion was interned in the Soviet Union and many of its members were sent to labor camps.

Overcoming enemy resistance, Sochor's company contributed to the capture of the bridge prepared for the explosion on the Zhytomyr highway and access to the near outskirts of Kiev from the side of the Syrets farm.

When the 1st Czechoslovak Army Corps was created in the spring of 1944, he took part in the Carpathian-Dukla operation of the troops of the 1st Ukrainian Front, and fought in Slovakia and Moravia until the complete liberation of Czechoslovakia from the Nazi invaders.

From August to December 1948 he was commander of a brigade of Jewish volunteers in training for the Israeli Defense Forces in Central Moravia.

His funeral took place on August 21, 1950, with a procession from the Liberation Memorial in Prague-Žižkov to the Prague-Strašnice crematorium, where the remains of the deceased were cremated.

When Sochor was returning from Israel in 1949, his plane was attacked by an unidentified fighter during a flight and had to make an emergency landing in Malta.

His son Ludvík also confirmed that they were striving for his life, stating in his memoirs that his father had talked to his mother that his car had been shot twice, that they wanted to kill him and that he would no longer take a step without a loaded submachine gun.