Original: The Battle of the Seelow Heights , fought over four days from 16 April until 19 April , was one of the last pitched battles of World War II : almost one million Red Army troops and more than 20,000 tanks and artillery pieces were deployed to break through the '' Gates to Berlin '' which were defended by about 100,000 German soldiers and 1,200 tanks and guns .
Simplified: On 16 April the Russians and Poles attacked the Seelow Heights . Almost 1,000,000 Russians\/Poles with 20,000 artillery pieces were fighting against 100,000 Germans with 1,200 tanks .