Where can I find Buddhist centres why might those be important

Four major Buddhist pilgrimage sites apply to all Buddhists. These are Lumbini, Bodh Gaya, Sarnath, and Kushinagar. (4) These pilgrimage sites compose of the core pilgrimage sites for Buddhism.

Explanation:

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.