Under "Great Tribulation" in the index note how many events occur. Some of which are at the same time:
This is before our current change in the possible timing of peace and security. I wrote in the "phases" in the timeline:
events before, in apparent sequence: kr 224; w11 8/15 21; w86 2/15 5-6
gathering of nations (Re 16:14 re 230-233; rs 48-49; ws 19-20
“saying, ‘peace and security!’” (1Th 5:3 w23.02 16; w23.06 13; w23.10 21; w19.09 9-10; w19.10 9; kr 222-224; w13 11/15 12-13; w12 9/15 3-4; w10 7/15 5; g 4/08 7; w04 2/1 20-21; wt 182; w97 6/1 9-10; w86 10/1 18-20; tp 5-7, 85
final sealing of 144,000 (Re 7:1-3 rr 180; w16.01 23; w15 3/15 15; kr 224; w13 11/15 13; w10 9/15 28; w07 1/1 30-31; w07 12/15 16; re 115-116, 277
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events during, in apparent sequence: ijwbq article 115; w23.10 21; w22.05 16-17; mwb22.11 11; mwb20.08 3; rr 64, 66, 69-70; w15 7/15 15-19; kr 224-225; w13 7/15 4-5; w12 4/15 22; w10 7/15 3; w08 5/15 15-16; w07 12/15 16; re 277; wt 182-183; w99 5/1 12-13; w97 4/1 14-16; w96 4/1 18-20; w96 8/15 19-20; kl 106; w94 3/1 19-23; w93 5/1 23-26; w86 10/1 20
heavens darkened for entire period (Re 6:12, 13 re 109-110; w88 10/15 17
disgusting thing stands “in a holy place,” “where it should not be” (Mt 24:15; Mr 13:14 w13 7/15 4-5; w99 5/1 15-18
Babylon the Great destroyed: ijwbq article 115; w22.05 16; w19.09 10-11; w19.10 14-15; rr 69-70, 168-170; w15 7/15 15-16; kr 223, 226; w13 7/15 4-5; w13 11/15 13; w12 9/15 4-5; g 11/12 12-13; w10 9/15 28; w09 3/15 18; re 256-258, 267-276; w97 4/1 14-15; w96 8/15 19
tribulation “cut short” (Mt 24:22; Mr 13:20 w19.10 15; w15 7/15 16; kr 223, 226; w13 7/15 5; w10 9/15 28; w99 5/1 10; w96 8/15 17-18
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flight to safety (Mt 24:16; Mr 13:14; Lu 21:21 w15 7/15 16; w12 4/15 26; w11 1/15 4; w99 5/1 18-19; w96 6/1 14-19
preaching “good news of the Kingdom” continues (Mt 24:14 w25.08 31
judgment message proclaimed (Re 16:21 w25.08 31; w20.05 15; w19.10 16; rr 66, 198; w15 7/15 16; w08 7/15 7; re 234
------------------------------------FINAL PHASE----------------------------------------
nations attack Jehovah’s people (Eze 38 ijwbq article 115; w24.05 12; w22.05 17; w22.10 16-17; w20.05 15; w19.09 11-12; w19.10 17; rr 186-188; w15 7/15 16-17, 19; w14 11/15 27; kr 227; w12 4/15 22, 26; w12 9/15 5-6; w09 3/15 18-19; w07 8/15 26; w03 6/1 15-22; w02 10/1 16; dp 283, 285; w97 4/1 15; w96 8/15 19-20
king of the north attacks Jehovah’s people (Da 11:44, 45 w20.05 15-16; rr 183; w15 5/15 29-30; dp 282; w93 11/1 21
‘kings of entire inhabited earth’ attack Jehovah’s people (Re 16:14, 16; 17:14; 19:19, 20 rr 183
“Assyrian” attacks Jehovah’s people (Mic 5:5 rr 183; w13 11/15 20
during attack, Jehovah’s people ‘enter inner rooms’ (Isa 26:20 w25.05 12-13; w23.07 7; w14 11/15 27
celestial phenomena (Mt 24:29; Mr 13:24, 25; Lu 21:25, 26 rr 198; w15 7/15 17; jy 258; kr 226; w94 2/15 17-20
Jesus comes, arrives (Mt 24:30; Mr 13:26; Lu 21:27 rr 179-180, 198; w15 7/15 17; kr 226; w13 7/15 7-8, 24; w98 9/15 16-18; w94 2/15 20-21
“chosen ones” gathered (Mt 24:31; Mr 13:27 ijwbq article 115; w24.02 2; w19.10 17-18; rr 198-199; w16.01 26; w15 7/15 18-19; kr 227-228; w13 7/15 5; w94 2/15 21
“faithful and discreet slave” appointed over all master’s belongings (Mt 24:46, 47 od 20; w13 7/15 24-25; w13 12/15 16
judgment of sheep and goats (Mt 25:31-46), deserving ones marked on forehead (Eze 9:4 ijwbq article 115; w24.09 20-21, 24; rr 179-180; w15 7/15 17-19; kr 226; w13 7/15 6-7; w10 9/15 28-29; w99 5/1 13; w95 10/15 22-24
war of Armageddon (Re 16:16; 17:14; 19:11-21 ijwbq article 115; w22.05 17; w22.09 21; rr 180; kr 228; w13 7/15 5-6; w97 4/1 15